RANKING · 2010 CENSUS · 44 SHOWN OF 44

Most population lost, Idaho counties · 2010

Idaho counties that lost 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

01Elmore County, IDID29,465-2,092−126%

02Shoshone County, IDID14,130-1,006+529%

03Bear Lake County, IDID6,727-425−230%

04Caribou County, IDID7,252-341−200%

05Clearwater County, IDID9,118-169−140%

06Minidoka County, IDID22,911-105−113%

07Clark County, IDID783-40−115%

08Butte County, IDID2,783-8−58%

09Custer County, IDID4,636+26−88%

10Lewis County, IDID3,704+74−68%

11Benewah County, IDID10,508+114−91%

12Camas County, IDID1,316+126−52%

13Lemhi County, IDID8,474+130−86%

14Oneida County, IDID5,085+161−75%

15Washington County, IDID11,583+221−85%

16Power County, IDID8,246+279−38%

17Boise County, IDID8,545+358−89%

18Adams County, IDID5,013+500+125%

19Idaho County, IDID17,874+756−56%

20Owyhee County, IDID12,661+882−61%

21Boundary County, IDID13,997+1,101−28%

22Lincoln County, IDID5,603+1,164+58%

23Gooding County, IDID16,446+1,309−48%

24Fremont County, IDID14,208+1,423+61%

25Franklin County, IDID15,889+1,457−31%

26Cassia County, IDID26,397+1,536−18%

27Gem County, IDID21,773+1,538−54%

28Nez Perce County, IDID42,905+1,855−49%

29Payette County, IDID27,824+2,045−51%

30Valley County, IDID12,831+2,211+43%

31Latah County, IDID41,842+2,309−47%

32Blaine County, IDID25,517+2,385−56%

33Bingham County, IDID51,153+3,872−7%

34Jerome County, IDID26,362+4,032+26%

35Bonner County, IDID54,420+4,042−60%

36Teton County, IDID13,254+4,171+63%

37Jefferson County, IDID35,297+6,985+167%

38Bannock County, IDID91,591+7,274−24%

39Madison County, IDID55,172+10,069+165%

40Twin Falls County, IDID97,539+12,946+21%

41Bonneville County, IDID135,771+21,712+110%

42Kootenai County, IDID191,864+29,809−23%

43Canyon County, IDID275,123+57,482+39%

44Ada County, IDID546,141+91,461−4%

SHOWING 1–44 OF 44

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