RANKING · 2010 CENSUS · 44 SHOWN OF 44

Most population gained, Idaho counties · 2010

Idaho counties that added the most residents from the 2000 census to 2010, by raw count of people rather than percentage. This list covers the 44 counties in Idaho that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Ada County, IDID546,141+91,461−4%

02Canyon County, IDID275,123+57,482+39%

03Kootenai County, IDID191,864+29,809−23%

04Bonneville County, IDID135,771+21,712+110%

05Twin Falls County, IDID97,539+12,946+21%

06Madison County, IDID55,172+10,069+165%

07Bannock County, IDID91,591+7,274−24%

08Jefferson County, IDID35,297+6,985+167%

09Teton County, IDID13,254+4,171+63%

10Bonner County, IDID54,420+4,042−60%

11Jerome County, IDID26,362+4,032+26%

12Bingham County, IDID51,153+3,872−7%

13Blaine County, IDID25,517+2,385−56%

14Latah County, IDID41,842+2,309−47%

15Valley County, IDID12,831+2,211+43%

16Payette County, IDID27,824+2,045−51%

17Nez Perce County, IDID42,905+1,855−49%

18Gem County, IDID21,773+1,538−54%

19Cassia County, IDID26,397+1,536−18%

20Franklin County, IDID15,889+1,457−31%

21Fremont County, IDID14,208+1,423+61%

22Gooding County, IDID16,446+1,309−48%

23Lincoln County, IDID5,603+1,164+58%

24Boundary County, IDID13,997+1,101−28%

25Owyhee County, IDID12,661+882−61%

26Idaho County, IDID17,874+756−56%

27Adams County, IDID5,013+500+125%

28Boise County, IDID8,545+358−89%

29Power County, IDID8,246+279−38%

30Washington County, IDID11,583+221−85%

31Oneida County, IDID5,085+161−75%

32Lemhi County, IDID8,474+130−86%

33Camas County, IDID1,316+126−52%

34Benewah County, IDID10,508+114−91%

35Lewis County, IDID3,704+74−68%

36Custer County, IDID4,636+26−88%

37Butte County, IDID2,783-8−58%

38Clark County, IDID783-40−115%

39Minidoka County, IDID22,911-105−113%

40Clearwater County, IDID9,118-169−140%

41Caribou County, IDID7,252-341−200%

42Bear Lake County, IDID6,727-425−230%

43Shoshone County, IDID14,130-1,006+529%

44Elmore County, IDID29,465-2,092−126%

SHOWING 1–44 OF 44

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS