RANKING · 2000 CENSUS · 44 SHOWN OF 44

Most sparsely populated, Idaho counties · 2000

Idaho counties with the fewest residents per square mile (2023). This list covers the 44 counties in Idaho that qualify, ranked against each other statewide.

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YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Clark County, IDID7831+0%

02Custer County, IDID4,6361+0%

03Camas County, IDID1,3161+0%

04Butte County, IDID2,7831+0%

05Owyhee County, IDID12,6611+0%

06Lemhi County, IDID8,4742+0%

07Idaho County, IDID17,8742+0%

08Valley County, IDID12,8312+0%

09Adams County, IDID5,0133+0%

10Lincoln County, IDID5,6033+0%

11Oneida County, IDID5,0853+0%

12Boise County, IDID8,5454+0%

13Clearwater County, IDID9,1184+0%

14Caribou County, IDID7,2524+0%

15Shoshone County, IDID14,1305+0%

16Power County, IDID8,2465+0%

17Fremont County, IDID14,2086+0%

18Bear Lake County, IDID6,7277+0%

19Washington County, IDID11,5837+0%

20Blaine County, IDID25,5177+0%

21Boundary County, IDID13,9978+0%

22Lewis County, IDID3,7048+0%

23Cassia County, IDID26,3978+0%

24Elmore County, IDID29,4659+0%

25Benewah County, IDID10,50812+0%

26Teton County, IDID13,25413+0%

27Franklin County, IDID15,88917+0%

28Jefferson County, IDID35,29718+0%

29Gooding County, IDID16,44619+0%

30Bingham County, IDID51,15320+0%

31Bonner County, IDID54,42021+0%

32Minidoka County, IDID22,91127+0%

33Gem County, IDID21,77327+0%

34Jerome County, IDID26,36231+0%

35Latah County, IDID41,84232+0%

36Twin Falls County, IDID97,53933+0%

37Nez Perce County, IDID42,90544+0%

38Bonneville County, IDID135,77144+0%

39Payette County, IDID27,82451+0%

40Madison County, IDID55,17259+0%

41Bannock County, IDID91,59168+0%

42Kootenai County, IDID191,86488+0%

43Canyon County, IDID275,123224+0%

44Ada County, IDID546,141286+0%

SHOWING 1–44 OF 44

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES