County ranking

Largest counties in the US by land area

The 50 largest county-equivalents by land area.

Short answer

Yukon-Koyukuk, AK ranks first with 145,769 square miles of land, followed by North Slope, AK (88,793) and Bethel, AK (40,661). The list ranks all 3,144 county-equivalents and shows the top 50.
#1 Yukon-Koyukuk, AK
145,769
  1. 01Yukon-Koyukuk, AK145,769
  2. 02North Slope, AK88,793
  3. 03Bethel, AK40,661
  4. 04Northwest Arctic, AK35,672
  5. 05Southeast Fairbanks, AK24,832
  6. 06Matanuska-Susitna, AK24,707
  7. 07Copper River, AK24,647
  8. 08Lake and Peninsula, AK23,831
  9. 09Nome, AK22,970
  10. 10San Bernardino County, CA20,068
  11. 11Coconino County, AZ18,616
  12. 12Dillingham, AK18,336
  13. 13Nye County, NV18,182
  14. 14Elko County, NV17,173
  15. 15Kusilvak, AK17,078
  16. 16Kenai Peninsula, AK16,018
  17. 17Mohave County, AZ13,332
  18. 18Denali, AK12,641
  19. 19Apache County, AZ11,198
  20. 20Lincoln County, NV10,633
  21. 21Sweetwater County, WY10,427
  22. 22Inyo County, CA10,197
  23. 23Harney County, OR10,134
  24. 24Navajo County, AZ9,950
  25. 25Malheur County, OR9,888
  26. 26Humboldt County, NV9,641
  27. 27Chugach, AK9,575
  28. 28Maricopa County, AZ9,202
  29. 29Pima County, AZ9,189
  30. 30Fremont County, WY9,184
  31. 31White Pine County, NV8,887
  32. 32Idaho County, ID8,478
  33. 33Lake County, OR8,139
  34. 34Kern County, CA8,135
  35. 35Yavapai County, AZ8,123
  36. 36Carbon County, WY7,898
  37. 37Clark County, NV7,892
  38. 38San Juan County, UT7,824
  39. 39Owyhee County, ID7,668
  40. 40Yakutat, AK7,628
  41. 41Fairbanks North Star, AK7,335
  42. 42Riverside County, CA7,209
  43. 43Tooele County, UT7,040
  44. 44Aleutians East, AK6,986
  45. 45Park County, WY6,939
  46. 46Catron County, NM6,924
  47. 47Millard County, UT6,785
  48. 48Kodiak Island, AK6,689
  49. 49Aroostook County, ME6,671
  50. 50Socorro County, NM6,646
Land sq mi. Rank 1 at the top.
GeorgiaIndianaMaineMinnesotaNorth DakotaColoradoAlaskaArkansasIllinoisIowaMississippiNew YorkTennesseeTexasVirginiaKansasAlabamaNorth CarolinaMichiganMissouriNebraskaOhioSouth CarolinaVermontWisconsinCaliforniaKentuckySouth DakotaNevadaFloridaMarylandPennsylvaniaArizonaRhode IslandIdahoOregonMontanaWashingtonWest VirginiaNew MexicoNew HampshireOklahomaUtahWyomingHawaiiLouisianaMassachusettsConnecticutNew JerseyDelawareDistrict of Columbia

Dots mark the location of each of the 50 rows listed.

Why Alaska dominates the list

18 of the 50 largest county-equivalents are in Alaska, where boroughs and census areas cover huge, thinly settled regions. Outside Alaska the largest is San Bernardino County, CA, at 20,068 square miles.

  1. 1San Bernardino County, CA20,068 sq mi
  2. 2Coconino County, AZ18,616 sq mi
  3. 3Nye County, NV18,182 sq mi
  4. 4Elko County, NV17,173 sq mi
  5. 5Mohave County, AZ13,332 sq mi
  6. 6Apache County, AZ11,198 sq mi
  7. 7Lincoln County, NV10,633 sq mi
  8. 8Sweetwater County, WY10,427 sq mi
  9. 9Inyo County, CA10,197 sq mi
  10. 10Harney County, OR10,134 sq mi

How this ranking is built

Every county-equivalent in the 50 states and DC is sorted by its 2024 Gazetteer land area. Ties are broken by FIPS code. Each row links to the county page with its full profile and state rank.

Questions people ask

Which county ranks first?

Yukon-Koyukuk, AK, with 145,769 square miles of land.

Which data does this use?

Census 2024 Gazetteer land area, which excludes water.

Are parishes and independent cities included?

Yes. All county-equivalents are ranked, including Louisiana parishes, Alaska boroughs and census areas, independent cities, Connecticut planning regions, and DC.

Suggested citation

Online Map Tools. "Largest counties in the US by land area." Published 2026-09-30. https://onlinemaptools.com/rankings/largest-counties-by-area. Data: Census Vintage 2024 county population estimates; Census 2024 Gazetteer, counties.

Journalists, students and researchers may quote these figures and reuse the table. Please credit Online Map Tools and link to this page. The underlying government data is in the public domain.

Download the data (CSV)

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties

How every number is computed: methodology. Spotted a wrong figure? Report an error.

Browse every state on the states page.