RANKING · 2024 ACS · 44 SHOWN OF 44

Largest senior population, Idaho counties

Idaho counties home to the most residents aged 65 and over as of 2024. 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, IDID546,14184,270+209%

02Kootenai County, IDID191,86436,591+174%

03Canyon County, IDID275,12336,467+152%

04Bonneville County, IDID135,77117,950+114%

05Twin Falls County, IDID97,53915,548+70%

06Bannock County, IDID91,59113,708+79%

07Bonner County, IDID54,42013,477+179%

08Nez Perce County, IDID42,9058,998+46%

09Bingham County, IDID51,1537,538+75%

10Latah County, IDID41,8426,078+84%

11Blaine County, IDID25,5175,665+282%

12Payette County, IDID27,8245,288+94%

13Idaho County, IDID17,8745,124+94%

14Gem County, IDID21,7734,755+100%

15Elmore County, IDID29,4654,338+109%

16Jefferson County, IDID35,2973,954+123%

17Cassia County, IDID26,3973,693+35%

18Minidoka County, IDID22,9113,576+35%

19Jerome County, IDID26,3623,363+49%

20Valley County, IDID12,8313,349+195%

21Shoshone County, IDID14,1303,214+34%

22Boundary County, IDID13,9973,093+134%

23Washington County, IDID11,5832,964+68%

24Madison County, IDID55,1722,945+78%

25Gooding County, IDID16,4462,940+35%

26Clearwater County, IDID9,1182,614+88%

27Lemhi County, IDID8,4742,550+95%

28Fremont County, IDID14,2082,547+73%

29Benewah County, IDID10,5082,426+86%

30Owyhee County, IDID12,6612,414+87%

31Boise County, IDID8,5452,339+220%

32Franklin County, IDID15,8892,249+70%

33Teton County, IDID13,2541,778+297%

34Custer County, IDID4,6361,634+159%

35Adams County, IDID5,0131,429+155%

36Bear Lake County, IDID6,7271,410+41%

37Power County, IDID8,2461,381+76%

38Caribou County, IDID7,2521,298+31%

39Lewis County, IDID3,7041,043+51%

40Oneida County, IDID5,085949+45%

41Lincoln County, IDID5,603825+56%

42Butte County, IDID2,783544+26%

43Camas County, IDID1,316217+68%

44Clark County, IDID783103+10%

SHOWING 1–44 OF 44

Download CSV (full list, 44 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES