U.S. Fish and Wildlife Service

The Fish and Wildlife Service manages the National Wildlife Refuge System and the wilderness areas inside refuges. 620 units on this site, 171 million acres together. Largest first.

National wildlife refuges

549

51 million acres
Mariana Trench National Wildlife RefugeAK
20 million acres
Yukon Delta National Wildlife RefugeAK
20 million acres
Arctic National Wildlife RefugeAK
9.0 million acres
Yukon Flats National Wildlife RefugeAK
4.6 million acres
Alaska Maritime National Wildlife RefugeAK
4.3 million acres
Togiak National Wildlife RefugeAK
4.0 million acres
Innoko National Wildlife RefugeAK
4.0 million acres
Koyukuk National Wildlife RefugeAK
3.5 million acres
Alaska Peninsula National Wildlife RefugeAK
2.7 million acres
Selawik National Wildlife RefugeAK
1.9 million acres
Kenai National Wildlife RefugeAK
1.9 million acres
Nowitna National Wildlife RefugeAK
1.6 million acres
Kodiak National Wildlife RefugeAK
1.6 million acres
Desert National Wildlife RefugeNV
1.3 million acres
Kanuti National Wildlife RefugeAK
1.2 million acres
Becharof National Wildlife RefugeAK
937,047 acres
Charles M. Russell National Wildlife RefugeMT
856,684 acres
Cabeza Prieta National Wildlife RefugeAZ
726,650 acres
Tetlin National Wildlife RefugeAK
664,626 acres
Kofa National Wildlife RefugeAZ
580,337 acres
Midway Atoll National Wildlife RefugeHI
576,366 acres
Sheldon National Wildlife RefugeNV
566,465 acres
Johnston Atoll National Wildlife RefugeHI
531,067 acres
Palmyra Atoll National Wildlife RefugeHI
497,055 acres
Wake Atoll National Wildlife RefugeAK
485,630 acres
Kingman Reef National Wildlife RefugeHI
434,242 acres
Jarvis Island National Wildlife RefugeHI
422,019 acres
Howland Island National Wildlife RefugeHI
413,057 acres
Baker Island National Wildlife RefugeHI
407,615 acres
Okefenokee National Wildlife RefugeGA

Show all 549

363,650 acres
Navassa Island National Wildlife RefugePR
315,412 acres
Izembek National Wildlife RefugeAK
278,536 acres
Hart Mountain National Antelope RefugeOR
256,096 acres
Hawaiian Islands National Wildlife RefugeHI
227,792 acres
Sevilleta National Wildlife RefugeNM
210,597 acres
Key West National Wildlife RefugeFL
190,553 acres
Upper Mississippi River National Wildlife and Fish RefugeWI, IA, MN and IL
188,147 acres
Malheur National Wildlife RefugeOR
162,461 acres
Saddle Mountain National Wildlife RefugeWA
157,588 acres
Dale Bumpers White River National Wildlife RefugeAR
153,637 acres
Alligator River National Wildlife RefugeNC
145,264 acres
Arthur R. Marshall Loxahatchee National Wildlife RefugeFL
135,673 acres
Great White Heron National Wildlife RefugeFL
129,991 acres
Merritt Island National Wildlife RefugeFL
124,964 acres
Sabine National Wildlife RefugeLA
117,677 acres
Buenos Aires National Wildlife RefugeAZ
116,612 acres
Aransas National Wildlife RefugeTX
116,496 acres
Pocosin Lakes National Wildlife RefugeNC
114,142 acres
Great Dismal Swamp National Wildlife RefugeVA and NC
101,120 acres
Lower Rio Grande Valley National Wildlife RefugeTX
100,892 acres
Laguna Atascosa National Wildlife RefugeTX
95,462 acres
Seney National Wildlife RefugeMI
91,589 acres
St. Marks National Wildlife RefugeFL
85,815 acres
Baca National Wildlife RefugeCO
85,504 acres
Red Rock Lakes National Wildlife RefugeMT
83,143 acres
Stillwater National Wildlife RefugeNV
81,619 acres
National Key Deer RefugeFL
78,075 acres
Tensas River National Wildlife RefugeLA
77,630 acres
Felsenthal National Wildlife RefugeAR
77,296 acres
Bear River Migratory Bird RefugeUT
74,723 acres
Cache River National Wildlife RefugeAR
74,548 acres
San Bernard National Wildlife RefugeTX
73,672 acres
Valentine National Wildlife RefugeNE
67,486 acres
McFaddin National Wildlife RefugeTX
62,093 acres
Cape Romain National Wildlife RefugeSC
61,880 acres
Agassiz National Wildlife RefugeMN
59,320 acres
J. Clark Salyer National Wildlife RefugeND
59,030 acres
Wichita Mountains Wildlife RefugeOK
57,354 acres
San Andres National Wildlife RefugeNM
57,268 acres
Bosque del Apache National Wildlife RefugeNM
55,779 acres
Ul Bend National Wildlife RefugeMT
54,646 acres
Upper Ouachita National Wildlife RefugeLA
53,795 acres
Silvio O. Conte National Fish and Wildlife RefugeVT, NH, MA and CT
52,548 acres
Lower Klamath National Wildlife RefugeCA and OR
51,858 acres
Lower Suwannee National Wildlife RefugeFL
50,680 acres
Big Oaks National Wildlife RefugeIN
50,441 acres
Tennessee National Wildlife RefugeTN
50,341 acres
Delta National Wildlife RefugeLA
49,850 acres
Mattamuskeet National Wildlife RefugeNC
48,786 acres
Hakalau Forest National Wildlife RefugeHI
48,326 acres
Sam D. Hamilton Noxubee National Wildlife RefugeMS
47,259 acres
Brazoria National Wildlife RefugeTX
46,953 acres
Klamath Marsh National Wildlife RefugeOR
46,726 acres
Crescent Lake National Wildlife RefugeNE
45,905 acres
Carolina Sandhills National Wildlife RefugeSC
45,560 acres
Mariana Arc of Fire National Wildlife RefugeAK
45,495 acres
Crab Orchard National Wildlife RefugeIL
44,151 acres
Edwin B. Forsythe National Wildlife RefugeNJ
44,087 acres
Necedah National Wildlife RefugeWI
42,412 acres
Tamarac National Wildlife RefugeMN
41,797 acres
Panther Swamp National Wildlife RefugeMS
40,908 acres
Little Pend Oreille National Wildlife RefugeWA
40,055 acres
Ruby Lake National Wildlife RefugeNV
39,530 acres
Piedmont National Wildlife RefugeGA
39,140 acres
Umbagog National Wildlife RefugeNH and ME
39,096 acres
Jocelyn Nungaray National Wildlife RefugeTX
38,953 acres
Havasu National Wildlife RefugeAZ and CA
38,344 acres
Waccamaw National Wildlife RefugeSC
37,739 acres
Tule Lake National Wildlife RefugeCA
37,265 acres
Sonny Bono Salton Sea National Wildlife RefugeCA
36,563 acres
Bogue Chitto National Wildlife RefugeLA and MS
34,765 acres
Blackwater National Wildlife RefugeMD
33,989 acres
Ten Thousand Islands National Wildlife RefugeFL
33,827 acres
Wheeler National Wildlife RefugeAL
33,234 acres
Lacassine National Wildlife RefugeLA
32,196 acres
Upper Souris National Wildlife RefugeND
32,144 acres
Salt Plains National Wildlife RefugeOK
31,613 acres
Savannah National Wildlife RefugeSC and GA
31,484 acres
Medicine Lake National Wildlife RefugeMT
31,453 acres
Imperial National Wildlife RefugeAZ and CA
30,680 acres
Sherburne National Wildlife RefugeMN
29,786 acres
Moosehorn National Wildlife RefugeME
29,403 acres
Trinity River National Wildlife RefugeTX
29,046 acres
Columbia National Wildlife RefugeWA
28,854 acres
Pond Creek National Wildlife RefugeAR
28,759 acres
Upper Klamath National Wildlife RefugeOR
28,453 acres
Don Edwards San Francisco Bay National Wildlife RefugeCA
28,133 acres
Chassahowitzka National Wildlife RefugeFL
28,070 acres
Bayou Sauvage Urban National Wildlife RefugeLA
27,626 acres
Balcones Canyonlands National Wildlife RefugeTX
27,357 acres
Lostwood National Wildlife RefugeND
26,837 acres
Chickasaw National Wildlife RefugeTN and AR
26,423 acres
Florida Panther National Wildlife RefugeFL
25,896 acres
Seedskadee National Wildlife RefugeWY
25,563 acres
Arapaho National Wildlife RefugeCO
25,186 acres
Catahoula National Wildlife RefugeLA
24,876 acres
Bitter Lake National Wildlife RefugeNM
24,851 acres
National Elk RefugeWY
24,801 acres
Leslie Canyon National Wildlife RefugeAZ
24,793 acres
St. Catherine Creek National Wildlife RefugeMS and LA
24,522 acres
Minidoka National Wildlife RefugeID
24,377 acres
Cameron Prairie National Wildlife RefugeLA
24,342 acres
Ash Meadows National Wildlife RefugeNV
24,228 acres
Clear Lake National Wildlife RefugeCA
23,758 acres
Guam National Wildlife RefugeAK
23,686 acres
Umatilla National Wildlife RefugeWA and OR
23,258 acres
Glacial Ridge National Wildlife RefugeMN
22,550 acres
Long Lake National Wildlife RefugeND
22,188 acres
Quivira National Wildlife RefugeKS
21,942 acres
Horicon National Wildlife RefugeWI
21,714 acres
Big Muddy National Fish and Wildlife RefugeMO
21,690 acres
Mingo National Wildlife RefugeMO
21,312 acres
Roanoke River National Wildlife RefugeNC
21,168 acres
Lake Woodruff National Wildlife RefugeFL
20,990 acres
Turnbull National Wildlife RefugeWA
20,938 acres
Sequoyah National Wildlife RefugeOK
20,751 acres
Willapa National Wildlife RefugeWA
20,467 acres
San Pablo Bay National Wildlife RefugeCA
20,125 acres
Grays Lake National Wildlife RefugeID
19,786 acres
Sand Lake National Wildlife RefugeSD
19,584 acres
Des Lacs National Wildlife RefugeND
19,443 acres
Big Branch Marsh National Wildlife RefugeLA
19,157 acres
Mississippi Sandhill Crane National Wildlife RefugeMS
19,085 acres
Fort Niobrara National Wildlife RefugeNE
19,024 acres
Canaan Valley National Wildlife RefugeWV
19,014 acres
Red River National Wildlife RefugeLA
18,601 acres
Port Louisa National Wildlife RefugeIA and IL
18,575 acres
Flint Hills National Wildlife RefugeKS
18,447 acres
Cibola National Wildlife RefugeAZ and CA
18,273 acres
Bear Lake National Wildlife RefugeID
18,088 acres
Rice Lake National Wildlife RefugeMN
18,047 acres
Fallon National Wildlife RefugeNV
17,963 acres
Fish Springs National Wildlife RefugeUT
17,814 acres
San Luis National Wildlife RefugeCA
17,670 acres
D'Arbonne National Wildlife RefugeLA
17,518 acres
Vieques National Wildlife RefugePR
17,410 acres
Lake Ophelia National Wildlife RefugeLA
17,231 acres
Northern Tallgrass Prairie National Wildlife RefugeMN and IA
16,852 acres
Pathfinder National Wildlife RefugeWY
16,780 acres
Lake Mason National Wildlife RefugeMT
16,734 acres
Lacreek National Wildlife RefugeSD
16,689 acres
Swanquarter National Wildlife RefugeNC
16,622 acres
Cypress Creek National Wildlife RefugeIL
16,466 acres
Tishomingo National Wildlife RefugeOK
16,250 acres
Monte Vista National Wildlife RefugeCO
16,024 acres
Arrowwood National Wildlife RefugeND
15,971 acres
Rocky Mountain Arsenal National Wildlife RefugeCO
15,820 acres
McNary National Wildlife RefugeWA and OR
15,779 acres
Atchafalaya National Wildlife RefugeLA
15,529 acres
Bowdoin National Wildlife RefugeMT
15,517 acres
Hillside National Wildlife RefugeMS
15,472 acres
Bombay Hook National Wildlife RefugeDE
15,439 acres
Bald Knob National Wildlife RefugeAR
15,174 acres
Bayou Cocodrie National Wildlife RefugeLA
14,872 acres
Bitter Creek National Wildlife RefugeCA
14,802 acres
Minnesota Valley National Wildlife RefugeMN
14,782 acres
Audubon National Wildlife RefugeND
14,360 acres
Cedar Island National Wildlife RefugeNC
14,242 acres
Little River National Wildlife RefugeOK
14,186 acres
Lower Hatchie National Wildlife RefugeTN
13,578 acres
Overflow National Wildlife RefugeAR
13,289 acres
Cape May National Wildlife RefugeNJ
13,230 acres
Everglades Headwaters National Wildlife Refuge and Conservation AreaFL
13,199 acres
Patoka River National Wildlife RefugeIN
13,044 acres
Yazoo National Wildlife RefugeMS
12,952 acres
Patuxent Research RefugeMD
12,869 acres
Lewis and Clark National Wildlife RefugeOR
12,832 acres
Santee National Wildlife RefugeSC
12,474 acres
San Diego National Wildlife RefugeCA
12,387 acres
Benton Lake National Wildlife RefugeMT
12,338 acres
Chincoteague National Wildlife RefugeVA and MD
12,242 acres
Lake Alice National Wildlife RefugeND
12,232 acres
Rappahannock River Valley National Wildlife RefugeVA
12,211 acres
St. Vincent National Wildlife RefugeFL
12,181 acres
Ernest F. Hollings Ace Basin National Wildlife RefugeSC
12,104 acres
Browns Park National Wildlife RefugeCO
12,065 acres
Alamosa National Wildlife RefugeCO
11,940 acres
Ouray National Wildlife RefugeUT
11,928 acres
Breton National Wildlife RefugeLA
11,921 acres
Big Stone National Wildlife RefugeMN
11,823 acres
Great River National Wildlife RefugeIL and MO
11,818 acres
Clarks River National Wildlife RefugeKY
11,758 acres
Bayou Teche National Wildlife RefugeLA
11,745 acres
San Joaquin River National Wildlife RefugeCA
11,713 acres
Swan Lake National Wildlife RefugeMO
11,594 acres
Sunkhaze Meadows National Wildlife RefugeME
11,576 acres
Deer Flat National Wildlife RefugeID and OR
11,480 acres
Hatchie National Wildlife RefugeTN
11,439 acres
Sacramento River National Wildlife RefugeCA
11,350 acres
Cat Island National Wildlife RefugeLA
11,302 acres
Hagerman National Wildlife RefugeTX
11,229 acres
Kern National Wildlife RefugeCA
11,119 acres
Attwater Prairie Chicken National Wildlife RefugeTX
10,998 acres
Big Lake National Wildlife RefugeAR
10,998 acres
Eufaula National Wildlife RefugeAL and GA
10,931 acres
Sacramento National Wildlife RefugeCA
10,797 acres
Iroquois National Wildlife RefugeNY
10,794 acres
Camas National Wildlife RefugeID
10,776 acres
Kirwin National Wildlife RefugeKS
10,593 acres
Neches River National Wildlife RefugeTX
10,559 acres
Deep Fork National Wildlife RefugeOK
10,411 acres
Reelfoot National Wildlife RefugeTN and KY
10,315 acres
Grand Bay National Wildlife RefugeMS and AL
10,308 acres
Shiawassee National Wildlife RefugeMI
10,304 acres
Montezuma National Wildlife RefugeNY
10,206 acres
Wassaw National Wildlife RefugeGA
10,161 acres
Prime Hook National Wildlife RefugeDE
9,777 acres
Dahomey National Wildlife RefugeMS
9,285 acres
Buffalo Lake National Wildlife RefugeTX and ND
9,010 acres
Mountain Longleaf National Wildlife RefugeAL
8,987 acres
Erie National Wildlife RefugePA
8,907 acres
Lost Trail National Wildlife RefugeMT
8,850 acres
Cross Creeks National Wildlife RefugeTN
8,788 acres
Back Bay National Wildlife RefugeVA
8,745 acres
Bond Swamp National Wildlife RefugeGA
8,735 acres
Mackay Island National Wildlife RefugeNC and VA
8,722 acres
Cokeville Meadows National Wildlife RefugeWY
8,708 acres
Las Vegas National Wildlife RefugeNM
8,621 acres
Pee Dee National Wildlife RefugeNC
8,536 acres
Ottawa National Wildlife RefugeOH
8,511 acres
Middle Mississippi River National Wildlife RefugeIL and MO
8,368 acres
Texas Point National Wildlife RefugeTX
8,354 acres
Desoto National Wildlife RefugeNE and IA
8,321 acres
Tewaukon National Wildlife RefugeND
8,112 acres
Washita National Wildlife RefugeOK
8,105 acres
Caddo Lake National Wildlife RefugeTX
7,985 acres
Currituck National Wildlife RefugeNC
7,939 acres
Monomoy National Wildlife RefugeMA
7,928 acres
Two Rivers National Wildlife RefugeIL and MO
7,858 acres
Great Swamp National Wildlife RefugeNJ
7,844 acres
Muscatatuck National Wildlife RefugeIN
7,596 acres
Marais Des Cygnes National Wildlife RefugeKS
7,566 acres
Petit Manan National Wildlife RefugeME
7,556 acres
Morgan Brake National Wildlife RefugeMS
7,485 acres
Pixley National Wildlife RefugeCA
7,446 acres
Loess Bluffs National Wildlife RefugeMO
7,362 acres
Missisquoi National Wildlife RefugeVT
7,329 acres
Bon Secour National Wildlife RefugeAL
7,223 acres
Conboy Lake National Wildlife RefugeWA
7,169 acres
Modoc National Wildlife RefugeCA
6,950 acres
Trempealeau National Wildlife RefugeWI
6,767 acres
Crocodile Lake National Wildlife RefugeFL
6,621 acres
Kirtlands Warbler Wildlife Management AreaMI
6,614 acres
J. N. "Ding" Darling National Wildlife RefugeFL
6,582 acres
Chautauqua National Wildlife RefugeIL
6,554 acres
Muleshoe National Wildlife RefugeTX
6,472 acres
Stone Lakes National Wildlife RefugeCA
6,392 acres
St. Johns National Wildlife RefugeFL
6,265 acres
Theodore Roosevelt National Wildlife RefugeMS
6,172 acres
Neal Smith National Wildlife RefugeIA
6,095 acres
Billy Frank Jr. Nisqually National Wildlife RefugeWA
6,012 acres
Holla Bend National Wildlife RefugeAR
6,012 acres
Wallkill River National Wildlife RefugeNJ and NY
5,985 acres
Bill Williams River National Wildlife RefugeAZ
5,935 acres
Grand Cote National Wildlife RefugeLA
5,876 acres
Julia Butler Hansen Refuge for the Columbian White Tail DeerOR and WA
5,844 acres
Delevan National Wildlife RefugeCA
5,835 acres
Cherry Valley National Wildlife RefugePA
5,749 acres
Rachel Carson National Wildlife RefugeME
5,693 acres
William L. Finley National Wildlife RefugeOR
5,667 acres
Detroit River International Wildlife RefugeMI
5,647 acres
Wapanocca National Wildlife RefugeAR
5,598 acres
Blackbeard Island National Wildlife RefugeGA
5,523 acres
Rock Lake National Wildlife RefugeND
5,423 acres
Pelican Island National Wildlife RefugeFL
5,252 acres
Black Bayou Lake National Wildlife RefugeLA
5,251 acres
Rocky Flats National Wildlife RefugeCO
5,245 acres
Aroostook National Wildlife RefugeME
5,006 acres
Ozark Plateau National Wildlife RefugeOK
4,998 acres
Ridgefield National Wildlife RefugeWA
4,862 acres
Pea Island National Wildlife RefugeNC
4,785 acres
Cahaba River National Wildlife RefugeAL
4,675 acres
Tallahatchie National Wildlife RefugeMS
4,633 acres
Waubay National Wildlife RefugeSD
4,632 acres
Mandalay National Wildlife RefugeLA
4,627 acres
James River National Wildlife RefugeVA
4,627 acres
Wolf Island National Wildlife RefugeGA
4,619 acres
Pahranagat National Wildlife RefugeNV
4,555 acres
Oahu Forest National Wildlife RefugeHI
4,534 acres
Parker River National Wildlife RefugeMA
4,521 acres
Big Boggy National Wildlife RefugeTX
4,351 acres
Chase Lake National Wildlife RefugeND
4,331 acres
Optima National Wildlife RefugeOK
4,281 acres
Martin National Wildlife RefugeMD
4,228 acres
Rio Mora National Wildlife Refuge and Conservation AreaNM
4,227 acres
Bear Valley National Wildlife RefugeOR
4,111 acres
Colusa National Wildlife RefugeCA
4,050 acres
Grass Lake National Wildlife RefugeMT
3,972 acres
Pinckney Island National Wildlife RefugeSC
3,967 acres
Boyer Chute National Wildlife RefugeNE and IA
3,953 acres
Choctaw National Wildlife RefugeAL
3,934 acres
Clarence Cannon National Wildlife RefugeMO and IL
3,922 acres
Humboldt Bay National Wildlife RefugeCA
3,883 acres
Great Meadows National Wildlife RefugeMA
3,851 acres
Little Sandy National Wildlife RefugeTX
3,843 acres
Lake Zahl National Wildlife RefugeND
3,822 acres
Merced National Wildlife RefugeCA
3,793 acres
Lake Ilo National Wildlife RefugeND
3,700 acres
Meredosia National Wildlife RefugeIL
3,680 acres
Supawna Meadows National Wildlife RefugeNJ and DE
3,635 acres
Maxwell National Wildlife RefugeNM
3,602 acres
Coachella Valley National Wildlife RefugeCA
3,555 acres
Moody National Wildlife RefugeTX
3,441 acres
Hamden Slough National Wildlife RefugeMN
3,382 acres
Congressman Lester Wolff Oyster Bay National Wildlife RefugeNY
3,333 acres
Silver Lake National Wildlife RefugeND
3,237 acres
Grulla National Wildlife RefugeNM
3,218 acres
Ohio River Islands National Wildlife RefugeWV, OH, KY and PA
3,125 acres
Cold Springs National Wildlife RefugeOR
3,062 acres
Lake Nettie National Wildlife RefugeND
3,056 acres
Plum Tree Island National Wildlife RefugeVA
3,047 acres
Lake George National Wildlife RefugeND
3,026 acres
Ankeny National Wildlife RefugeOR
2,996 acres
Slade National Wildlife RefugeND
2,970 acres
Banks Lake National Wildlife RefugeGA
2,908 acres
North Platte National Wildlife RefugeNE
2,853 acres
War Horse National Wildlife RefugeMT
2,841 acres
Harris Neck National Wildlife RefugeGA
2,840 acres
Union Slough National Wildlife RefugeIA
2,827 acres
Lee Metcalf National Wildlife RefugeMT
2,774 acres
Kootenai National Wildlife RefugeID
2,755 acres
Ardoch National Wildlife RefugeND
2,692 acres
Emiquon National Wildlife RefugeIL
2,669 acres
Baskett Slough National Wildlife RefugeOR
2,664 acres
Dakota Lake National Wildlife RefugeND
2,656 acres
Wertheim National Wildlife RefugeNY
2,610 acres
Cedar Point National Wildlife RefugeOH
2,610 acres
San Diego Bay National Wildlife RefugeCA
2,605 acres
Sutter National Wildlife RefugeCA
2,573 acres
Willow Lake National Wildlife RefugeND
2,554 acres
Mortenson Lake National Wildlife RefugeWY
2,516 acres
Coldwater River National Wildlife RefugeMS
2,492 acres
Guadalupe-Nipomo Dunes National Wildlife RefugeCA
2,482 acres
Pablo National Wildlife RefugeMT
2,405 acres
John W. and Louise Seier National Wildlife RefugeNE
2,385 acres
Assabet River National Wildlife RefugeMA
2,365 acres
Mathews Brake National Wildlife RefugeMS
2,365 acres
San Bernardino National Wildlife RefugeAZ
2,335 acres
Hopper Mountain National Wildlife RefugeCA
2,274 acres
Elizabeth Hartwell Mason Neck National Wildlife RefugeVA
2,204 acres
Crane Meadows National Wildlife RefugeMN
2,179 acres
Green River National Wildlife RefugeKY
2,124 acres
Eastern Neck National Wildlife RefugeMD
2,110 acres
Santa Ana National Wildlife RefugeTX
2,092 acres
Ninepipe National Wildlife RefugeMT
2,034 acres
Rydell National Wildlife RefugeMN
2,006 acres
Hobart Lake National Wildlife RefugeND
2,004 acres
Fisherman Island National Wildlife RefugeVA
2,003 acres
Johnson Lake National Wildlife RefugeND
1,999 acres
Toppenish National Wildlife RefugeWA
1,995 acres
Hutton Lake National Wildlife RefugeWY
1,968 acres
Brumba National Wildlife RefugeND
1,937 acres
Swan River National Wildlife RefugeMT
1,894 acres
Lords Lake National Wildlife RefugeND
1,891 acres
Florence Lake National Wildlife RefugeND
1,884 acres
Cabo Rojo National Wildlife RefugePR
1,831 acres
McKay Creek National Wildlife RefugeOR
1,827 acres
Shell Lake National Wildlife RefugeND
1,825 acres
Lake Wales Ridge National Wildlife RefugeFL
1,808 acres
Lake Isom National Wildlife RefugeTN
1,798 acres
Green Bay National Wildlife RefugeWI and MI
1,730 acres
Cross Island National Wildlife RefugeME
1,701 acres
Oxbow National Wildlife RefugeMA
1,662 acres
Wapack National Wildlife RefugeNH
1,658 acres
Rose Atoll National Wildlife RefugeHI
1,564 acres
Snyder Lake National Wildlife RefugeND
1,538 acres
Holt Collier National Wildlife RefugeMS
1,442 acres
Dungeness National Wildlife RefugeWA
1,437 acres
Culebra National Wildlife RefugePR
1,409 acres
Tualatin River National Wildlife RefugeOR
1,394 acres
Karl E. Mundt National Wildlife RefugeSD and NE
1,387 acres
Grays Harbor National Wildlife RefugeWA
1,315 acres
Steigerwald Lake National Wildlife RefugeWA
1,314 acres
Black Coulee National Wildlife RefugeMT
1,308 acres
Presquile National Wildlife RefugeVA
1,237 acres
Driftless Area National Wildlife RefugeIA
1,218 acres
Lambs Lake National Wildlife RefugeND
1,201 acres
Hackmatack National Wildlife RefugeIL and WI
1,187 acres
Nestucca Bay National Wildlife RefugeOR
1,170 acres
Great Bay National Wildlife RefugeNH
1,169 acres
Bamforth National Wildlife RefugeWY
1,093 acres
Tijuana Slough National Wildlife RefugeCA
1,073 acres
James Campbell National Wildlife RefugeHI
1,071 acres
Sibley Lake National Wildlife RefugeND
1,059 acres
Key Cave National Wildlife RefugeAL
1,047 acres
Nathaniel P. Reed Hobe Sound National Wildlife RefugeFL
1,044 acres
Stewart B. McKinney National Wildlife RefugeCT
1,036 acres
White Lake National Wildlife RefugeND
1,024 acres
Cottonwood Lake National Wildlife RefugeND
998 acres
John Heinz National Wildlife Refuge at TinicumPA
997 acres
Fox River National Wildlife RefugeWI
993 acres
Kellys Slough National Wildlife RefugeND
983 acres
Seal Beach National Wildlife RefugeCA
964 acres
Lost Lake National Wildlife RefugeND
955 acres
Wapato Lake National Wildlife RefugeOR
953 acres
Lake Andes National Wildlife RefugeSD
940 acres
White Horse Hill National Game PreserveND
916 acres
Hanalei National Wildlife RefugeHI
906 acres
Appert Lake National Wildlife RefugeND
906 acres
Blue Ridge National Wildlife RefugeCA
905 acres
Cedar Keys National Wildlife RefugeFL
899 acres
Bandon Marsh National Wildlife RefugeOR
887 acres
Stoney Slough National Wildlife RefugeND
886 acres
Ninigret National Wildlife RefugeRI
884 acres
Pleasant Lake National Wildlife RefugeND
848 acres
Rose Lake National Wildlife RefugeND
837 acres
Michigan Islands National Wildlife RefugeMI
801 acres
Lake Patricia National Wildlife RefugeND
800 acres
Trustom Pond National Wildlife RefugeRI
796 acres
Great Thicket National Wildlife RefugeME, CT and NY
782 acres
Wild Rice Lake National Wildlife RefugeND
770 acres
Sheyenne Lake National Wildlife RefugeND
760 acres
Laguna Cartagena National Wildlife RefugePR
723 acres
Harbor Island National Wildlife RefugeMI
721 acres
Maple River National Wildlife RefugeND
720 acres
Hewitt Lake National Wildlife RefugeMT
713 acres
Kealia Pond National Wildlife RefugeHI
677 acres
Storm Lake National Wildlife RefugeND
664 acres
Tybee National Wildlife RefugeGA and SC
663 acres
McLean National Wildlife RefugeND
646 acres
Springwater National Wildlife RefugeND
638 acres
Bone Hill National Wildlife RefugeND
638 acres
Stewart Lake National Wildlife RefugeND
630 acres
Occoquan Bay National Wildlife RefugeVA
623 acres
Nomans Land Island National Wildlife RefugeMA
597 acres
Shawangunk Grasslands National Wildlife RefugeNY
589 acres
Camp Lake National Wildlife RefugeND
584 acres
Pine Island National Wildlife RefugeFL
576 acres
Hiddenwood National Wildlife RefugeND
574 acres
Valle de Oro National Wildlife RefugeNM
573 acres
Siletz Bay National Wildlife RefugeOR
571 acres
Franz Lake National Wildlife RefugeWA
546 acres
John H. Chafee National Wildlife RefugeRI
518 acres
Sandy Point National Wildlife RefugePR
490 acres
Matlacha Pass National Wildlife RefugeFL
474 acres
Hutchinson Lake National Wildlife RefugeND
469 acres
Marin Islands National Wildlife RefugeCA
455 acres
Whittlesey Creek National Wildlife RefugeWI
438 acres
Tomahawk National Wildlife RefugeND
425 acres
Nansemond National Wildlife RefugeVA
423 acres
Eastern Shore of Virginia National Wildlife RefugeVA
402 acres
Bear Butte National Wildlife RefugeSD
394 acres
San Juan Islands National Wildlife RefugeWA
391 acres
Protection Island National Wildlife RefugeWA
387 acres
Salinas River National Wildlife RefugeCA
386 acres
Pierce National Wildlife RefugeWA
380 acres
Pinellas National Wildlife RefugeFL
377 acres
Oregon Islands National Wildlife RefugeOR
360 acres
Wallops Island National Wildlife RefugeVA
353 acres
Mashpee National Wildlife RefugeMA
353 acres
School Section Lake National Wildlife RefugeND
328 acres
Sunburst Lake National Wildlife RefugeND
323 acres
Lake Otis National Wildlife RefugeND
316 acres
Desecheo National Wildlife RefugePR
306 acres
Canfield Lake National Wildlife RefugeND
283 acres
Little Goose National Wildlife RefugeND
283 acres
Wood Lake National Wildlife RefugeND
273 acres
Featherstone National Wildlife RefugeVA
263 acres
Sauta Cave National Wildlife RefugeAL
252 acres
Rabb Lake National Wildlife RefugeND
248 acres
Huleia National Wildlife RefugeHI
245 acres
Sachuest Point National Wildlife RefugeRI
239 acres
Anaho Island National Wildlife RefugeNV
238 acres
Wintering River National Wildlife RefugeND
231 acres
Egmont Key National Wildlife RefugeFL
228 acres
Archie Carr National Wildlife RefugeFL
208 acres
Seatuck National Wildlife RefugeNY
206 acres
Massasoit National Wildlife RefugeMA
204 acres
Fern Cave National Wildlife RefugeAL
193 acres
Ellicott Slough National Wildlife RefugeCA
185 acres
Elizabeth Alexandra Morton National Wildlife RefugeNY
180 acres
Kilauea Point National Wildlife RefugeHI
158 acres
Half-Way Lake National Wildlife RefugeND
156 acres
Hailstone National Wildlife RefugeMT
143 acres
Cape Meares National Wildlife RefugeOR
136 acres
Moapa Valley National Wildlife RefugeNV
134 acres
Huron National Wildlife RefugeMI
131 acres
Block Island National Wildlife RefugeRI
129 acres
Crystal River National Wildlife RefugeFL
125 acres
Gravel Island National Wildlife RefugeWI
125 acres
Logan Cave National Wildlife RefugeAR
119 acres
Seal Island National Wildlife RefugeME
114 acres
Pearl Harbor National Wildlife RefugeHI
102 acres
Farallon Islands National Wildlife RefugeCA
96 acres
Pilot Knob National Wildlife RefugeMO
87 acres
Paint Rock River National Wildlife RefugeTN
84 acres
Creedman Coulee National Wildlife RefugeMT
81 acres
John Hay National Wildlife RefugeNH
78 acres
Target Rock National Wildlife RefugeNY
77 acres
Flattery Rocks National Wildlife RefugeWA
74 acres
West Sister Island National Wildlife RefugeOH
69 acres
Two Ponds National Wildlife RefugeCO
65 acres
Kankakee National Wildlife Refuge and Conservation AreaIL
63 acres
Quillayute Needles National Wildlife RefugeWA
62 acres
Conscience Point National Wildlife RefugeNY
61 acres
Passage Key National Wildlife RefugeFL
60 acres
Antioch Dunes National Wildlife RefugeCA
48 acres
Buck Island National Wildlife RefugePR
44 acres
Kakahaia National Wildlife RefugeHI
41 acres
Ozark Cavefish National Wildlife RefugeMO
40 acres
Amagansett National Wildlife RefugeNY
32 acres
Southern Maryland Woodlands National Wildlife RefugeMD
28 acres
Island Bay National Wildlife RefugeFL
24 acres
Watercress Darter National Wildlife RefugeAL
23 acres
Lake Thibadeau National Wildlife RefugeMT
20 acres
Nantucket National Wildlife RefugeMA
20 acres
Stump Lake National Wildlife RefugeND
19 acres
Copalis National Wildlife RefugeWA
17 acres
Thacher Island National Wildlife RefugeMA
14 acres
Pond Island National Wildlife RefugeME
13 acres
Franklin Island National Wildlife RefugeME
12 acres
Caloosahatchee National Wildlife RefugeFL
12 acres
Castle Rock National Wildlife RefugeCA
12 acres
Green Cay National Wildlife RefugePR
8.1 acres
Three Arch Rocks National Wildlife RefugeOR
1.5 acres
Shell Keys National Wildlife RefugeLA
0.9 acres
Susquehanna National Wildlife RefugeMD
0.7 acres
Kofa Administrative SiteAZ
0.3 acres
Mille Lacs National Wildlife RefugeMN

Wilderness areas

8.0 million acres
Mollie Beattie WildernessAK
2.3 million acres
Togiak WildernessAK
1.4 million acres
Kenai WildernessAK
1.3 million acres
Aleutian Islands WildernessAK
1.3 million acres
Andreafsky WildernessAK
1.2 million acres
Innoko WildernessAK
910,000 acres
Unimak WildernessAK
803,418 acres
Cabeza Prieta WildernessAZ
600,000 acres
Nunivak WildernessAK
516,200 acres
Kofa WildernessAZ
400,000 acres
Becharof WildernessAK
400,000 acres
Koyukuk WildernessAK
353,981 acres
Okefenokee WildernessGA
307,981 acres
Izembek WildernessAK
250,000 acres
Semidi WildernessAK
240,000 acres
Selawik WildernessAK
81,340 acres
Bering Sea WildernessAK
32,350 acres
Red Rock Lakes WildernessMT
30,427 acres
Bosque del Apache WildernessNM
29,027 acres
Mount Massive WildernessCO
29,000 acres
Cape Romain WildernessSC
25,855 acres
Simeonof WildernessAK
25,150 acres
Seney WildernessMI
23,578 acres
Chassahowitzka WildernessFL
20,819 acres
UL Bend WildernessMT
17,801 acres
Havasu WildernessAZ and CA
17,350 acres
St. Marks WildernessFL
15,056 acres
Imperial Refuge WildernessAZ and CA
11,366 acres
Medicine Lake WildernessMT
9,621 acres
Salt Creek WildernessNM

Show all 71

8,784 acres
Swanquarter WildernessNC
8,570 acres
Wichita Mountains WildernessOK
7,730 acres
Mingo WildernessMO
6,681 acres
Brigantine WildernessNJ
6,197 acres
Florida Keys WildernessFL
5,577 acres
Lostwood WildernessND
5,566 acres
Tuxedni WildernessAK
5,125 acres
Wolf Island WildernessGA
5,000 acres
Breton WildernessLA
4,680 acres
Moosehorn (Baring Unit) WildernessME
4,635 acres
Fort Niobrara WildernessNE
4,155 acres
Chase Lake WildernessND
4,050 acres
Crab Orchard WildernessIL
4,000 acres
Agassiz WildernessMN
3,660 acres
Great Swamp National Wildlife Refuge WildernessNJ
3,345 acres
Lacassine WildernessLA
3,244 acres
Monomoy WildernessMA
3,000 acres
Blackbeard Island WildernessGA
2,832 acres
Forrester Island WildernessAK
2,712 acres
Moosehorn WildernessME
2,619 acres
J.N. "Ding" Darling WildernessFL
2,180 acres
Tamarac WildernessMN
2,143 acres
Big Lake WildernessAR
1,066 acres
Lake Woodruff WildernessFL
593 acres
Oregon Islands WildernessOR
455 acres
Chamisso WildernessAK
451 acres
Washington Islands WildernessWA
379 acres
Cedar Keys WildernessFL
353 acres
San Juan WildernessWA
175 acres
Bogoslof WildernessAK
146 acres
Huron Islands WildernessMI
141 acres
Farallon WildernessCA
77 acres
West Sister Island WildernessOH
65 acres
Saint Lazaria WildernessAK
36 acres
Passage Key WildernessFL
32 acres
Hazy Islands WildernessAK
29 acres
Wisconsin Islands WildernessWI
20 acres
Island Bay WildernessFL
15 acres
Three Arch Rocks WildernessOR
12 acres
Michigan Islands WildernessMI
5 acres
Pelican Island WildernessFL

A unit is listed under every agency the boundary layer names as managing it. Data refreshed September 18, 2026.