RANKING · 2000 CENSUS · 44 SHOWN OF 44

Fastest shrinking, Idaho counties · 2000

Idaho counties with the steepest population decline since the prior decennial census. This list covers the 44 counties in Idaho that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Shoshone County, IDID14,130-1.1%+0%

02Butte County, IDID2,783-0.7%+0%

03Minidoka County, IDID22,911+4.2%+0%

04Caribou County, IDID7,252+4.9%+0%

05Clearwater County, IDID9,118+5.0%+0%

06Custer County, IDID4,636+5.1%+0%

07Bear Lake County, IDID6,727+5.4%+0%

08Power County, IDID8,246+6.4%+0%

09Lewis County, IDID3,704+6.6%+0%

10Adams County, IDID5,013+6.8%+0%

11Fremont County, IDID14,208+8.1%+0%

12Cassia County, IDID26,397+9.6%+0%

13Nez Perce County, IDID42,905+10.8%+0%

14Bingham County, IDID51,153+11.0%+0%

15Idaho County, IDID17,874+12.5%+0%

16Lemhi County, IDID8,474+13.1%+0%

17Latah County, IDID41,842+14.1%+0%

18Bonneville County, IDID135,771+14.3%+0%

19Bannock County, IDID91,591+14.4%+0%

20Benewah County, IDID10,508+15.5%+0%

21Jefferson County, IDID35,297+15.8%+0%

22Madison County, IDID55,172+16.0%+0%

23Washington County, IDID11,583+16.7%+0%

24Oneida County, IDID5,085+18.1%+0%

25Boundary County, IDID13,997+18.5%+0%

26Twin Falls County, IDID97,539+20.0%+0%

27Jerome County, IDID26,362+21.2%+0%

28Gooding County, IDID16,446+21.7%+0%

29Lincoln County, IDID5,603+22.2%+0%

30Franklin County, IDID15,889+22.7%+0%

31Payette County, IDID27,824+25.2%+0%

32Valley County, IDID12,831+25.2%+0%

33Owyhee County, IDID12,661+26.8%+0%

34Gem County, IDID21,773+28.2%+0%

35Clark County, IDID783+34.1%+0%

36Camas County, IDID1,316+36.3%+0%

37Elmore County, IDID29,465+37.4%+0%

38Bonner County, IDID54,420+38.4%+0%

39Blaine County, IDID25,517+40.1%+0%

40Canyon County, IDID275,123+45.9%+0%

41Ada County, IDID546,141+46.2%+0%

42Kootenai County, IDID191,864+55.7%+0%

43Teton County, IDID13,254+74.4%+0%

44Boise County, IDID8,545+90.1%+0%

SHOWING 1–44 OF 44

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