RANKING · 1990 CENSUS · 44 SHOWN OF 44

Largest senior population, Idaho counties · 1990

Idaho counties home to the most residents aged 65 and over as of 1990. Ranked by number of people, not the senior share. This list covers the 44 counties in Idaho that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS –

01Ada County, IDID546,14121,419–

02Canyon County, IDID275,12312,292–

03Kootenai County, IDID191,8649,354–

04Twin Falls County, IDID97,5398,167–

05Bannock County, IDID91,5916,698–

06Bonneville County, IDID135,7716,459–

07Nez Perce County, IDID42,9055,413–

08Bonner County, IDID54,4203,919–

09Bingham County, IDID51,1533,764–

10Latah County, IDID41,8422,947–

11Payette County, IDID27,8242,680–

12Minidoka County, IDID22,9112,389–

13Cassia County, IDID26,3972,372–

14Shoshone County, IDID14,1302,329–

15Idaho County, IDID17,8742,153–

16Jerome County, IDID26,3622,126–

17Gem County, IDID21,7732,115–

18Gooding County, IDID16,4462,007–

19Washington County, IDID11,5831,682–

20Jefferson County, IDID35,2971,620–

21Elmore County, IDID29,4651,586–

22Madison County, IDID55,1721,366–

23Franklin County, IDID15,8891,284–

24Clearwater County, IDID9,1181,281–

25Fremont County, IDID14,2081,237–

26Lemhi County, IDID8,4741,205–

27Owyhee County, IDID12,6611,072–

28Benewah County, IDID10,5081,047–

29Boundary County, IDID13,9971,021–

30Bear Lake County, IDID6,727915–

31Blaine County, IDID25,517896–

32Caribou County, IDID7,252814–

33Valley County, IDID12,831781–

34Power County, IDID8,246722–

35Oneida County, IDID5,085618–

36Lewis County, IDID3,704614–

37Custer County, IDID4,636498–

38Adams County, IDID5,013475–

39Lincoln County, IDID5,603468–

40Boise County, IDID8,545384–

41Teton County, IDID13,254382–

42Butte County, IDID2,783375–

43Camas County, IDID1,31699–

44Clark County, IDID78393–

SHOWING 1–44 OF 44

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