RANKING · 2010 CENSUS · 44 SHOWN OF 44

Largest senior population, Idaho counties · 2010

Idaho counties home to the most residents aged 65 and over as of 2010. Ranked by number of people, not the senior share. This list covers the 44 counties in Idaho that qualify, ranked against each other statewide.

IdahoAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 2000

01Ada County, IDID546,14141,048+50%

02Canyon County, IDID275,12320,396+41%

03Kootenai County, IDID191,86420,078+50%

04Bonneville County, IDID135,77111,343+35%

05Twin Falls County, IDID97,53910,706+17%

06Bannock County, IDID91,5919,243+21%

07Nez Perce County, IDID42,9057,063+14%

08Bonner County, IDID54,4207,009+45%

09Bingham County, IDID51,1535,214+21%

10Latah County, IDID41,8423,858+16%

11Payette County, IDID27,8243,462+27%

12Idaho County, IDID17,8743,444+30%

13Gem County, IDID21,7733,107+31%

14Minidoka County, IDID22,9112,969+12%

15Cassia County, IDID26,3972,954+8%

16Elmore County, IDID29,4652,716+31%

17Shoshone County, IDID14,1302,537+6%

18Jerome County, IDID26,3622,507+11%

19Jefferson County, IDID35,2972,504+41%

20Blaine County, IDID25,5172,476+67%

21Gooding County, IDID16,4462,328+7%

22Madison County, IDID55,1722,092+26%

23Washington County, IDID11,5832,091+19%

24Clearwater County, IDID9,1181,960+41%

25Fremont County, IDID14,2081,844+26%

26Boundary County, IDID13,9971,832+39%

27Lemhi County, IDID8,4741,758+34%

28Benewah County, IDID10,5081,699+30%

29Valley County, IDID12,8311,659+46%

30Franklin County, IDID15,8891,643+24%

31Owyhee County, IDID12,6611,612+25%

32Boise County, IDID8,5451,118+53%

33Bear Lake County, IDID6,7271,104+11%

34Caribou County, IDID7,2521,103+11%

35Power County, IDID8,246947+21%

36Lewis County, IDID3,704834+20%

37Adams County, IDID5,013828+48%

38Custer County, IDID4,636818+30%

39Oneida County, IDID5,085714+9%

40Teton County, IDID13,254664+48%

41Lincoln County, IDID5,603573+9%

42Butte County, IDID2,783506+17%

43Camas County, IDID1,316178+38%

44Clark County, IDID783129+37%

SHOWING 1–44 OF 44

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