Largest counties by total area
Rankings include both Census land and water measurements. Water can change the order substantially, especially for coastal counties and counties bordering the Great Lakes.
Ranks 1–100
3,222 county equivalents · page 1 of 33
What this part of the ranking shows
This page runs from Yukon-Koyukuk Census Area, Alaska at 147,878.152 mi² of total area to San Miguel County, New Mexico at 4,741.353 mi² of total area. The 100 entries represent 19 state-level jurisdictions. Alaska has the most entries on this page (23).
Yukon-Koyukuk Census Area ranks first at 147,878.152 mi² of total area. The gap to second-place North Slope Borough is 53,050.228 mi². Compare the first two entries for separate land and water measurements.
Total area includes water assigned to the statistical geography. A higher position here does not imply more land for settlement or a larger population.
| Rank | County / equivalent | State | Land mi² | Total mi² | Water share |
|---|---|---|---|---|---|
| 1 | Yukon-Koyukuk Census Area | Alaska | 145,767.5 | 147,878.2 | 1.4% |
| 2 | North Slope Borough | Alaska | 88,797.6 | 94,827.9 | 6.4% |
| 3 | Bethel Census Area | Alaska | 40,654.9 | 45,555.6 | 10.8% |
| 4 | Northwest Arctic Borough | Alaska | 35,672.3 | 40,619.8 | 12.2% |
| 5 | Lake and Peninsula Borough | Alaska | 23,896.5 | 33,810.4 | 29.3% |
| 6 | Nome Census Area | Alaska | 22,969.9 | 28,290.2 | 18.8% |
| 7 | Matanuska-Susitna Borough | Alaska | 24,703 | 25,267.7 | 2.2% |
| 8 | Southeast Fairbanks Census Area | Alaska | 24,839.3 | 25,121.6 | 1.1% |
| 9 | Copper River Census Area | Alaska | 24,646.1 | 25,117.4 | 1.9% |
| 10 | Kenai Peninsula Borough | Alaska | 16,017.1 | 24,721.2 | 35.2% |
| 11 | Dillingham Census Area | Alaska | 18,355.9 | 20,628 | 11% |
| 12 | San Bernardino County | California | 20,068.4 | 20,105.7 | 0.2% |
| 13 | Kusilvak Census Area | Alaska | 17,151.5 | 19,658.6 | 12.8% |
| 14 | Coconino County | Arizona | 18,616.4 | 18,661.4 | 0.2% |
| 15 | Nye County | Nevada | 18,181.9 | 18,198.6 | 0.1% |
| 16 | Elko County | Nevada | 17,173.3 | 17,202.3 | 0.2% |
| 17 | Chugach Census Area | Alaska | 9,574.5 | 15,187.9 | 37% |
| 18 | Aleutians East Borough | Alaska | 6,985.2 | 15,016.2 | 53.5% |
| 19 | Aleutians West Census Area | Alaska | 4,387.3 | 14,116.5 | 68.9% |
| 20 | Mohave County | Arizona | 13,332.1 | 13,460.8 | 1% |
| 21 | Denali Borough | Alaska | 12,641.2 | 12,666.6 | 0.2% |
| 22 | Kodiak Island Borough | Alaska | 6,689.9 | 12,152 | 44.9% |
| 23 | Apache County | Arizona | 11,198.4 | 11,219.2 | 0.2% |
| 24 | Prince of Wales-Hyder Census Area | Alaska | 5,268.2 | 10,914.9 | 51.7% |
| 25 | Lincoln County | Nevada | 10,633.4 | 10,637.2 | 0% |
| 26 | Sweetwater County | Wyoming | 10,427 | 10,491.2 | 0.6% |
| 27 | Harney County | Oregon | 10,134.5 | 10,227.7 | 0.9% |
| 28 | Inyo County | California | 10,197.3 | 10,227.1 | 0.3% |
| 29 | Navajo County | Arizona | 9,949.5 | 9,958.8 | 0.1% |
| 30 | Malheur County | Oregon | 9,887.7 | 9,929.8 | 0.4% |
| 31 | Humboldt County | Nevada | 9,640.8 | 9,657.9 | 0.2% |
| 32 | Hoonah-Angoon Census Area | Alaska | 6,560 | 9,585.4 | 31.6% |
| 33 | Fremont County | Wyoming | 9,183.6 | 9,265.7 | 0.9% |
| 34 | Maricopa County | Arizona | 9,202 | 9,226 | 0.3% |
| 35 | Pima County | Arizona | 9,188.7 | 9,190.7 | 0% |
| 36 | Yakutat City and Borough | Alaska | 7,638.2 | 9,164.6 | 16.7% |
| 37 | White Pine County | Nevada | 8,886.7 | 8,895.7 | 0.1% |
| 38 | Idaho County | Idaho | 8,477.5 | 8,503.6 | 0.3% |
| 39 | Lake County | Oregon | 8,138.6 | 8,358.1 | 2.6% |
| 40 | Kern County | California | 8,134.7 | 8,164.9 | 0.4% |
| 41 | Yavapai County | Arizona | 8,122.9 | 8,127.3 | 0.1% |
| 42 | Clark County | Nevada | 7,891.7 | 8,060.9 | 2.1% |
| 43 | Carbon County | Wyoming | 7,897.7 | 7,964 | 0.8% |
| 44 | San Juan County | Utah | 7,823.7 | 7,933.8 | 1.4% |
| 45 | Owyhee County | Idaho | 7,668.2 | 7,696.8 | 0.4% |
| 46 | Fairbanks North Star Borough | Alaska | 7,334.7 | 7,434.9 | 1.3% |
| 47 | Riverside County | California | 7,209 | 7,302.7 | 1.3% |
| 48 | Tooele County | Utah | 7,040.3 | 7,286 | 3.4% |
| 49 | Park County | Wyoming | 6,939 | 6,965.2 | 0.4% |
| 50 | Catron County | New Mexico | 6,924.2 | 6,929.7 | 0.1% |
| 51 | St. Louis County | Minnesota | 6,248.1 | 6,860.6 | 8.9% |
| 52 | Millard County | Utah | 6,785.5 | 6,836.9 | 0.8% |
| 53 | Aroostook County | Maine | 6,671.2 | 6,827.5 | 2.3% |
| 54 | Box Elder County | Utah | 5,781.3 | 6,729.2 | 14.1% |
| 55 | Ketchikan Gateway Borough | Alaska | 4,857.1 | 6,677.6 | 27.3% |
| 56 | Socorro County | New Mexico | 6,646.4 | 6,648.3 | 0% |
| 57 | Otero County | New Mexico | 6,612.6 | 6,626.8 | 0.2% |
| 58 | Washoe County | Nevada | 6,315.9 | 6,540.9 | 3.4% |
| 59 | Siskiyou County | California | 6,278.8 | 6,347.9 | 1.1% |
| 60 | Cochise County | Arizona | 6,209.9 | 6,216.7 | 0.1% |
| 61 | Brewster County | Texas | 6,183.8 | 6,192.3 | 0.1% |
| 62 | Klamath County | Oregon | 5,949.9 | 6,137.2 | 3.1% |
| 63 | Chaves County | New Mexico | 6,067.2 | 6,075.1 | 0.1% |
| 64 | Pershing County | Nevada | 6,036.6 | 6,067.5 | 0.5% |
| 65 | Fresno County | California | 5,958.6 | 6,011.3 | 0.9% |
| 66 | Cherry County | Nebraska | 5,960.1 | 6,009.6 | 0.8% |
| 67 | Keweenaw County | Michigan | 540.1 | 5,966.3 | 90.9% |
| 68 | Rio Arriba County | New Mexico | 5,860.9 | 5,896.2 | 0.6% |
| 69 | Beaverhead County | Montana | 5,542.7 | 5,572.9 | 0.5% |
| 70 | San Juan County | New Mexico | 5,517.2 | 5,538.4 | 0.4% |
| 71 | Lander County | Nevada | 5,519.2 | 5,519.5 | 0% |
| 72 | Yuma County | Arizona | 5,513.8 | 5,518.9 | 0.1% |
| 73 | McKinley County | New Mexico | 5,451.1 | 5,456 | 0.1% |
| 74 | Natrona County | Wyoming | 5,340.5 | 5,375.7 | 0.7% |
| 75 | Pinal County | Arizona | 5,366.7 | 5,374.7 | 0.1% |
| 76 | Okanogan County | Washington | 5,266.2 | 5,312.7 | 0.9% |
| 77 | Monroe County | Florida | 983 | 5,289.6 | 81.4% |
| 78 | Flathead County | Montana | 5,087.3 | 5,256 | 3.2% |
| 79 | Phillips County | Montana | 5,140.4 | 5,212 | 1.4% |
| 80 | Garfield County | Utah | 5,179.6 | 5,208.9 | 0.6% |
| 81 | Douglas County | Oregon | 5,035.8 | 5,133 | 1.9% |
| 82 | Hawaii County | Hawaii | 4,028.4 | 5,086.2 | 20.8% |
| 83 | Valley County | Montana | 4,926.1 | 5,061.8 | 2.7% |
| 84 | Alger County | Michigan | 915 | 5,047.7 | 81.9% |
| 85 | Rosebud County | Montana | 5,008.1 | 5,025.2 | 0.3% |
| 86 | Churchill County | Nevada | 4,950.2 | 5,023.8 | 1.5% |
| 87 | Big Horn County | Montana | 4,997.8 | 5,016.1 | 0.4% |
| 88 | Custer County | Idaho | 4,922.2 | 4,938.6 | 0.3% |
| 89 | Sublette County | Wyoming | 4,886.5 | 4,935.7 | 1% |
| 90 | Garfield County | Montana | 4,676.6 | 4,849.1 | 3.6% |
| 91 | Tulare County | California | 4,823.9 | 4,838.3 | 0.3% |
| 92 | Lincoln County | New Mexico | 4,831.1 | 4,831.3 | 0% |
| 93 | Campbell County | Wyoming | 4,802.1 | 4,806.3 | 0.1% |
| 94 | Gila County | Arizona | 4,757.6 | 4,794.8 | 0.8% |
| 95 | Las Animas County | Colorado | 4,772.9 | 4,775.6 | 0.1% |
| 96 | Sitka City and Borough | Alaska | 2,870.3 | 4,774.5 | 39.9% |
| 97 | Pecos County | Texas | 4,763.8 | 4,764.8 | 0% |
| 98 | Moffat County | Colorado | 4,743.3 | 4,750.9 | 0.2% |
| 99 | Los Angeles County | California | 4,060.3 | 4,749.4 | 14.5% |
| 100 | San Miguel County | New Mexico | 4,721.5 | 4,741.4 | 0.4% |
Read the differences behind ranks 1–100
The median total area among these 100 entries is 6,895.109 mi². The first and last entries span 143,136.799 square miles. This median describes the entries on this page, not the full national dataset. Pagination is a browsing boundary, not a distinct geographic region.
A difference of one position means only that two entries are adjacent in this ordering. Their actual size difference can be tiny or substantial. Compare the measurements as well as the rank, and use the original square-meter fields when rounded labels appear equal.
Where the entries on this page are located
- Alaska23 entries · 23% of this page
- Arizona11 entries · 11% of this page
- Nevada10 entries · 10% of this page
- New Mexico9 entries · 9% of this page
- California8 entries · 8% of this page
- Montana7 entries · 7% of this page
The remaining 13 jurisdictions contribute 32 entries. The list above shows the six most represented, with alphabetical ordering when counts tie.
These counts describe representation in this slice of the ranking. They do not measure a state’s share of national land or population. Compare the first and last county equivalents on this page to inspect land, water, and total area separately.
Read the geographic explanation behind this ranking, or return to the ranking overview for the national distribution and guidance on selecting a measurement.
Land rankings use original ALAND square meters; total-area rankings use ALAND + AWATER. Exact ties use ascending GEOID. Displayed square-mile values are rounded. Read the methodology.