Bureau of Land Management
The Bureau of Land Management manages the National Conservation Lands, which include its national monuments, national conservation areas and the wilderness areas on BLM land. 319 units on this site, 31 million acres together. Largest first.
Wilderness areas
- 2.4 million acres
- 314,835 acres
- 266,390 acres
- 252,149 acres
- 242,068 acres
- 236,726 acres
- 236,488 acres
- 230,966 acres
- 217,747 acresHells Canyon WildernessID and OR
- 199,208 acres
- 188,169 acres
- 182,298 acres
- 177,309 acres
- 170,202 acres
- 165,172 acres
- 157,716 acres
- 144,915 acres
- 142,996 acres
- 133,720 acres
- 129,800 acres
- 128,362 acres
- 123,508 acres
- 116,843 acres
- 112,400 acres
- 111,066 acres
- 110,816 acres
- 106,623 acres
- 105,085 acres
- 102,209 acres
- 101,574 acres
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- 99,548 acres
- 99,428 acres
- 98,023 acres
- 97,880 acres
- 90,776 acres
- 89,820 acres
- 89,500 acres
- 88,650 acres
- 87,900 acres
- 86,245 acres
- 85,864 acres
- 85,668 acres
- 83,195 acres
- 80,090 acres
- 78,754 acres
- 78,576 acres
- 76,413 acres
- 76,312 acres
- 76,123 acres
- 75,479 acresBlack Ridge Canyons WildernessCO and UT
- 73,868 acres
- 73,726 acres
- 72,192 acres
- 71,389 acres
- 68,623 acres
- 68,231 acres
- 67,214 acres
- 66,280 acres
- 65,726 acres
- 64,968 acres
- 64,000 acres
- 63,200 acres
- 62,742 acres
- 61,600 acres
- 60,442 acres
- 60,100 acres
- 59,107 acres
- 56,890 acres
- 56,819 acres
- 56,239 acres
- 54,643 acres
- 54,536 acres
- 52,753 acres
- 52,618 acres
- 51,305 acres
- 51,289 acres
- 50,930 acres
- 50,451 acres
- 49,296 acres
- 49,130 acres
- 48,355 acres
- 48,154 acres
- 48,080 acres
- 47,158 acres
- 46,943 acres
- 46,465 acres
- 45,384 acres
- 44,804 acres
- 44,447 acres
- 44,027 acres
- 43,996 acres
- 43,512 acres
- 43,420 acres
- 43,279 acres
- 42,695 acres
- 42,544 acres
- 42,079 acres
- 41,777 acres
- 40,303 acres
- 39,955 acres
- 39,631 acres
- 39,540 acres
- 39,167 acres
- 38,944 acres
- 38,599 acres
- 38,470 acres
- 38,216 acres
- 37,786 acres
- 37,308 acres
- 37,030 acres
- 36,299 acres
- 35,203 acres
- 34,400 acres
- 34,264 acres
- 33,843 acres
- 33,772 acres
- 33,466 acres
- 32,016 acres
- 31,906 acres
- 31,520 acres
- 31,358 acres
- 31,200 acres
- 31,059 acres
- 30,787 acres
- 30,648 acres
- 30,594 acres
- 30,539 acres
- 30,300 acres
- 30,186 acres
- 29,242 acres
- 29,182 acres
- 29,029 acres
- 28,955 acres
- 28,822 acres
- 28,274 acres
- 28,080 acres
- 28,052 acres
- 27,673 acres
- 27,502 acres
- 27,440 acres
- 27,296 acres
- 26,356 acres
- 26,102 acres
- 25,895 acres
- 25,707 acres
- 25,671 acres
- 25,050 acres
- 24,783 acres
- 24,707 acres
- 24,600 acres
- 24,433 acres
- 24,348 acres
- 24,249 acres
- 24,015 acres
- 24,004 acres
- 23,900 acres
- 23,710 acres
- 23,679 acres
- 23,439 acres
- 22,880 acres
- 22,366 acres
- 21,390 acres
- 21,000 acres
- 20,660 acres
- 20,548 acres
- 20,241 acres
- 19,935 acres
- 19,916 acres
- 19,440 acres
- 19,410 acres
- 19,339 acres
- 18,790 acres
- 18,689 acres
- 18,682 acres
- 18,667 acresBeaver Dam Mountains WildernessAZ and UT
- 18,631 acres
- 18,278 acres
- 18,216 acres
- 18,192 acres
- 18,119 acres
- 18,002 acres
- 17,784 acres
- 17,325 acres
- 17,250 acres
- 17,059 acres
- 16,935 acres
- 16,893 acres
- 16,776 acres
- 16,400 acres
- 16,343 acres
- 15,628 acres
- 15,400 acres
- 14,779 acres
- 14,740 acres
- 14,650 acres
- 14,645 acres
- 14,630 acres
- 14,400 acres
- 14,095 acres
- 14,050 acres
- 13,902 acres
- 13,832 acres
- 13,420 acres
- 13,350 acres
- 13,140 acres
- 13,107 acres
- 12,930 acres
- 12,897 acres
- 12,868 acres
- 12,556 acres
- 12,300 acres
- 12,201 acres
- 12,155 acres
- 11,840 acres
- 11,700 acres
- 11,667 acres
- 11,656 acres
- 11,114 acres
- 11,001 acres
- 11,001 acres
- 10,648 acres
- 10,500 acres
- 9,951 acres
- 9,616 acres
- 8,860 acres
- 8,760 acres
- 8,675 acres
- 8,382 acres
- 8,300 acres
- 8,191 acres
- 8,189 acres
- 8,120 acres
- 7,880 acres
- 7,810 acres
- 7,711 acres
- 7,242 acres
- 7,140 acres
- 6,964 acres
- 6,860 acres
- 6,600 acres
- 6,489 acres
- 6,404 acres
- 6,313 acres
- 6,287 acres
- 5,800 acres
- 5,800 acres
- 5,784 acres
- 5,479 acres
- 5,341 acres
- 5,100 acres
- 4,760 acres
- 4,478 acres
- 4,047 acres
- 3,291 acres
- 2,871 acres
- 2,040 acres
- 1,535 acres
- 1,530 acres
- 453 acres
- 93 acres
- 40 acres
- 35 acres
- 6 acres
BLM national monuments and conservation areas
- 1.8 million acres
- 1.2 million acres
- 1.0 million acres
- 960,963 acres
- 815,434 acres
- 752,317 acres
- 739,119 acres
- 708,590 acres
- 601,049 acres
- 573,986 acres
- 509,447 acres
- 507,066 acres
- 496,271 acres
- 495,942 acres
- 431,571 acres
- 421,086 acres
- 311,107 acres
- 297,117 acres
- 293,904 acres
- 279,535 acres
- 263,107 acres
- 246,845 acres
- 218,593 acres
- 201,531 acres
- 189,931 acres
- 182,568 acres
- 181,425 acres
- 174,844 acres
- 170,596 acresCascade–Siskiyou National MonumentOR and CA
- 160,109 acres
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- 124,157 acres
- 120,760 acres
- 72,510 acres
- 65,053 acres
- 62,057 acres
- 61,493 acres
- 61,170 acres
- 50,557 acres
- 48,072 acres
- 29,478 acres
- 27,872 acres
- 23,668 acres
- 21,709 acres
- 20,429 acres
- 18,831 acres
- 14,666 acres
- 8,664 acres
- 7,511 acres
- 5,403 acres
- 5,299 acres
- 3,362 acres
- 819 acresJurassicUT
- 109 acres
- 91 acres
- 58 acres
- 30 acres
A unit is listed under every agency the boundary layer names as managing it. Data refreshed September 18, 2026.