RANKING · 2010 CENSUS · 44 SHOWN OF 44

Fastest growing, Idaho counties · 2010

Idaho counties ranked by population growth 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 shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Teton County, IDID13,254+69.5%−4.9 pts

02Canyon County, IDID275,123+43.7%−2.2 pts

03Madison County, IDID55,172+36.7%+20.6 pts

04Jefferson County, IDID35,297+36.5%+20.7 pts

05Ada County, IDID546,141+30.4%−15.8 pts

06Valley County, IDID12,831+28.9%+3.7 pts

07Lincoln County, IDID5,603+28.8%+6.5 pts

08Kootenai County, IDID191,864+27.4%−28.3 pts

09Bonneville County, IDID135,771+26.3%+12.0 pts

10Jerome County, IDID26,362+22.0%+0.8 pts

11Twin Falls County, IDID97,539+20.1%+0.2 pts

12Adams County, IDID5,013+14.4%+7.6 pts

13Franklin County, IDID15,889+12.9%−9.9 pts

14Camas County, IDID1,316+12.7%−23.6 pts

15Blaine County, IDID25,517+12.6%−27.6 pts

16Fremont County, IDID14,208+12.0%+4.0 pts

17Boundary County, IDID13,997+11.2%−7.3 pts

18Bonner County, IDID54,420+11.0%−27.4 pts

19Gem County, IDID21,773+10.1%−18.0 pts

20Payette County, IDID27,824+9.9%−15.3 pts

21Bannock County, IDID91,591+9.6%−4.8 pts

22Bingham County, IDID51,153+9.3%−1.8 pts

23Gooding County, IDID16,446+9.2%−12.4 pts

24Owyhee County, IDID12,661+8.3%−18.5 pts

25Cassia County, IDID26,397+7.2%−2.5 pts

26Latah County, IDID41,842+6.6%−7.5 pts

27Boise County, IDID8,545+5.4%−84.7 pts

28Nez Perce County, IDID42,905+5.0%−5.9 pts

29Idaho County, IDID17,874+4.9%−7.7 pts

30Oneida County, IDID5,085+3.9%−14.2 pts

31Power County, IDID8,246+3.7%−2.7 pts

32Washington County, IDID11,583+2.2%−14.5 pts

33Lewis County, IDID3,704+2.0%−4.6 pts

34Lemhi County, IDID8,474+1.7%−11.5 pts

35Benewah County, IDID10,508+1.2%−14.3 pts

36Custer County, IDID4,636+0.6%−4.5 pts

37Butte County, IDID2,783-0.3%+0.4 pts

38Minidoka County, IDID22,911-0.5%−4.7 pts

39Clearwater County, IDID9,118-1.9%−6.9 pts

40Clark County, IDID783-3.9%−38.0 pts

41Caribou County, IDID7,252-4.7%−9.6 pts

42Bear Lake County, IDID6,727-6.6%−12.0 pts

43Elmore County, IDID29,465-7.2%−44.6 pts

44Shoshone County, IDID14,130-7.3%−6.2 pts

SHOWING 1–44 OF 44

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