County Maps US

The largest counties in the United States by land area

Yukon-Koyukuk Census Area, Alaska 145,767 sq mi

Which US county is the largest by area?

What this list shows

  • 3,144 of the 3,144 US counties and county-equivalents have a published figure for land area.
  • Alaska accounts for 21 of the top 100, ahead of Arizona with 12 and Nevada with 10.
  • The top 100 is not made up only of counties. It includes 10 census areas, 10 boroughs, and 1 city and borough. County-equivalents are ranked alongside counties here, and the type column says which is which.

The top 100

The largest counties in the United States by land area. Sortable on any column.
RankCountyStateTypeLand area
1Yukon-Koyukuk Census AreaAlaskaCensus Area145,767 sq mi
2North Slope BoroughAlaskaBorough88,793 sq mi
3Bethel Census AreaAlaskaCensus Area40,655 sq mi
4Northwest Arctic BoroughAlaskaBorough35,672 sq mi
5Southeast Fairbanks Census AreaAlaskaCensus Area24,839 sq mi
6Matanuska-Susitna BoroughAlaskaBorough24,707 sq mi
7Copper River Census AreaAlaskaCensus Area24,647 sq mi
8Lake and Peninsula BoroughAlaskaBorough23,897 sq mi
9Nome Census AreaAlaskaCensus Area22,970 sq mi
10San Bernardino CountyCaliforniaCounty20,068 sq mi
11Coconino CountyArizonaCounty18,616 sq mi
12Dillingham Census AreaAlaskaCensus Area18,353 sq mi
13Nye CountyNevadaCounty18,182 sq mi
14Elko CountyNevadaCounty17,173 sq mi
15Kusilvak Census AreaAlaskaCensus Area17,151 sq mi
16Kenai Peninsula BoroughAlaskaBorough16,018 sq mi
17Mohave CountyArizonaCounty13,332 sq mi
18Denali BoroughAlaskaBorough12,640 sq mi
19Apache CountyArizonaCounty11,198 sq mi
20Lincoln CountyNevadaCounty10,633 sq mi
21Sweetwater CountyWyomingCounty10,427 sq mi
22Inyo CountyCaliforniaCounty10,197 sq mi
23Harney CountyOregonCounty10,134 sq mi
24Navajo CountyArizonaCounty9,949 sq mi
25Malheur CountyOregonCounty9,888 sq mi
26Humboldt CountyNevadaCounty9,641 sq mi
27Chugach Census AreaAlaskaCensus Area9,574 sq mi
28Maricopa CountyArizonaCounty9,202 sq mi
29Pima CountyArizonaCounty9,189 sq mi
30Fremont CountyWyomingCounty9,184 sq mi
31White Pine CountyNevadaCounty8,887 sq mi
32Idaho CountyIdahoCounty8,477 sq mi
33Lake CountyOregonCounty8,139 sq mi
34Kern CountyCaliforniaCounty8,135 sq mi
35Yavapai CountyArizonaCounty8,123 sq mi
36Carbon CountyWyomingCounty7,898 sq mi
37Clark CountyNevadaCounty7,892 sq mi
38San Juan CountyUtahCounty7,824 sq mi
39Owyhee CountyIdahoCounty7,668 sq mi
40Yakutat City and BoroughAlaskaCity and Borough7,628 sq mi
41Fairbanks North Star BoroughAlaskaBorough7,335 sq mi
42Riverside CountyCaliforniaCounty7,209 sq mi
43Tooele CountyUtahCounty7,040 sq mi
44Aleutians East BoroughAlaskaBorough6,985 sq mi
45Park CountyWyomingCounty6,939 sq mi
46Catron CountyNew MexicoCounty6,924 sq mi
47Millard CountyUtahCounty6,785 sq mi
48Kodiak Island BoroughAlaskaBorough6,689 sq mi
49Aroostook CountyMaineCounty6,671 sq mi
50Socorro CountyNew MexicoCounty6,646 sq mi
51Otero CountyNew MexicoCounty6,613 sq mi
52Hoonah-Angoon Census AreaAlaskaCensus Area6,560 sq mi
53Washoe CountyNevadaCounty6,316 sq mi
54Siskiyou CountyCaliforniaCounty6,279 sq mi
55St. Louis CountyMinnesotaCounty6,248 sq mi
56Cochise CountyArizonaCounty6,210 sq mi
57Brewster CountyTexasCounty6,184 sq mi
58Chaves CountyNew MexicoCounty6,067 sq mi
59Pershing CountyNevadaCounty6,037 sq mi
60Cherry CountyNebraskaCounty5,960 sq mi
61Fresno CountyCaliforniaCounty5,959 sq mi
62Klamath CountyOregonCounty5,950 sq mi
63Rio Arriba CountyNew MexicoCounty5,861 sq mi
64Box Elder CountyUtahCounty5,781 sq mi
65Beaverhead CountyMontanaCounty5,543 sq mi
66Lander CountyNevadaCounty5,519 sq mi
67San Juan CountyNew MexicoCounty5,517 sq mi
68Yuma CountyArizonaCounty5,514 sq mi
69McKinley CountyNew MexicoCounty5,451 sq mi
70Pinal CountyArizonaCounty5,367 sq mi
71Natrona CountyWyomingCounty5,341 sq mi
72Prince of Wales-Hyder Census AreaAlaskaCensus Area5,268 sq mi
73Okanogan CountyWashingtonCounty5,266 sq mi
74Garfield CountyUtahCounty5,180 sq mi
75Phillips CountyMontanaCounty5,140 sq mi
76Flathead CountyMontanaCounty5,087 sq mi
77Douglas CountyOregonCounty5,036 sq mi
78Rosebud CountyMontanaCounty5,008 sq mi
79Big Horn CountyMontanaCounty4,998 sq mi
80Churchill CountyNevadaCounty4,950 sq mi
81Valley CountyMontanaCounty4,926 sq mi
82Custer CountyIdahoCounty4,922 sq mi
83Sublette CountyWyomingCounty4,886 sq mi
84Ketchikan Gateway BoroughAlaskaBorough4,857 sq mi
85Lincoln CountyNew MexicoCounty4,831 sq mi
86Tulare CountyCaliforniaCounty4,824 sq mi
87Campbell CountyWyomingCounty4,802 sq mi
88Las Animas CountyColoradoCounty4,773 sq mi
89Pecos CountyTexasCounty4,764 sq mi
90Gila CountyArizonaCounty4,758 sq mi
91Moffat CountyColoradoCounty4,743 sq mi
92San Miguel CountyNew MexicoCounty4,722 sq mi
93Garfield CountyMontanaCounty4,677 sq mi
94Graham CountyArizonaCounty4,622 sq mi
95Hudspeth CountyTexasCounty4,571 sq mi
96Lemhi CountyIdahoCounty4,564 sq mi
97Lane CountyOregonCounty4,554 sq mi
98Lassen CountyCaliforniaCounty4,541 sq mi
99Cibola CountyNew MexicoCounty4,540 sq mi
100Grant CountyOregonCounty4,528 sq mi

Source: US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.

This is the top 100. See the complete table of all 3,144 counties.

Other rankings

Rebuilt from source data 30 August 2026. How these figures are produced.