RANKING · 2020 CENSUS · 36 SHOWN OF 36

Oldest by median age, Idaho cities · 2020

Idaho cities ranked by median age of residents (2020 ACS). This list covers the 36 cities in Idaho that qualify, ranked against each other statewide. The median across all 36 is 34.2.

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SAME RANKING BYCounties States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Garden City, IDID13,04747.0+33%

02Eagle, IDID34,65845.8+30%

03Hayden, IDID17,36343.2+22%

04Weiser, IDID6,24942.4+18%

05Sandpoint, IDID10,64542.3+16%

06Star, IDID20,87440.5+43%

07Lewiston, IDID34,71739.9+5%

08Hailey, IDID10,05338.8+17%

09Coeur d'Alene, IDID58,17938.7+11%

10Payette, IDID8,81338.6+19%

11Emmett, IDID8,90038.2+10%

12Boise City, IDID238,42937.1+13%

13Rathdrum, IDID13,22735.9+26%

14Fruitland, IDID7,21335.8+14%

15Post Falls, IDID46,71535.8+14%

16Meridian, IDID142,98835.7+19%

17Middleton, IDID12,60034.2+23%

18Twin Falls, IDID56,21634.2+1%

19Idaho Falls, IDID71,78534.1+6%

20Blackfoot, IDID13,36133.8+9%

21Pocatello, IDID58,77133.4+16%

22Preston, IDID6,17733.4+18%

23Nampa, IDID120,38433.1+16%

24Chubbuck, IDID16,82332.9+12%

25Rupert, IDID6,46032.7+3%

26Mountain Home, IDID16,77932.5+3%

27Kimberly, IDID5,79832.0−4%

28Burley, IDID12,40931.6+2%

29Caldwell, IDID76,62931.0+8%

30Kuna, IDID31,52530.9+18%

31Ammon, IDID20,11930.8+7%

32Shelley, IDID5,30330.6+13%

33Jerome, IDID13,73130.1−3%

34Rigby, IDID5,75728.50%

35Moscow, IDID26,72126.6+9%

36Rexburg, IDID40,33422.8+12%

SHOWING 1–36 OF 36

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS