RANKING · 2010 CENSUS · 44 SHOWN OF 44

Fastest shrinking, Idaho counties · 2010

Idaho counties with the steepest population decline from the 2000 census to 2010. 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 population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Shoshone County, IDID14,130-7.3%−6.2 pts

02Elmore County, IDID29,465-7.2%−44.6 pts

03Bear Lake County, IDID6,727-6.6%−12.0 pts

04Caribou County, IDID7,252-4.7%−9.6 pts

05Clark County, IDID783-3.9%−38.0 pts

06Clearwater County, IDID9,118-1.9%−6.9 pts

07Minidoka County, IDID22,911-0.5%−4.7 pts

08Butte County, IDID2,783-0.3%+0.4 pts

09Custer County, IDID4,636+0.6%−4.5 pts

10Benewah County, IDID10,508+1.2%−14.3 pts

11Lemhi County, IDID8,474+1.7%−11.5 pts

12Lewis County, IDID3,704+2.0%−4.6 pts

13Washington County, IDID11,583+2.2%−14.5 pts

14Power County, IDID8,246+3.7%−2.7 pts

15Oneida County, IDID5,085+3.9%−14.2 pts

16Idaho County, IDID17,874+4.9%−7.7 pts

17Nez Perce County, IDID42,905+5.0%−5.9 pts

18Boise County, IDID8,545+5.4%−84.7 pts

19Latah County, IDID41,842+6.6%−7.5 pts

20Cassia County, IDID26,397+7.2%−2.5 pts

21Owyhee County, IDID12,661+8.3%−18.5 pts

22Gooding County, IDID16,446+9.2%−12.4 pts

23Bingham County, IDID51,153+9.3%−1.8 pts

24Bannock County, IDID91,591+9.6%−4.8 pts

25Payette County, IDID27,824+9.9%−15.3 pts

26Gem County, IDID21,773+10.1%−18.0 pts

27Bonner County, IDID54,420+11.0%−27.4 pts

28Boundary County, IDID13,997+11.2%−7.3 pts

29Fremont County, IDID14,208+12.0%+4.0 pts

30Blaine County, IDID25,517+12.6%−27.6 pts

31Camas County, IDID1,316+12.7%−23.6 pts

32Franklin County, IDID15,889+12.9%−9.9 pts

33Adams County, IDID5,013+14.4%+7.6 pts

34Twin Falls County, IDID97,539+20.1%+0.2 pts

35Jerome County, IDID26,362+22.0%+0.8 pts

36Bonneville County, IDID135,771+26.3%+12.0 pts

37Kootenai County, IDID191,864+27.4%−28.3 pts

38Lincoln County, IDID5,603+28.8%+6.5 pts

39Valley County, IDID12,831+28.9%+3.7 pts

40Ada County, IDID546,141+30.4%−15.8 pts

41Jefferson County, IDID35,297+36.5%+20.7 pts

42Madison County, IDID55,172+36.7%+20.6 pts

43Canyon County, IDID275,123+43.7%−2.2 pts

44Teton County, IDID13,254+69.5%−4.9 pts

SHOWING 1–44 OF 44

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS