RANKING · 2020 CENSUS · 36 SHOWN OF 36

Youngest by median age, Idaho cities · 2020

Idaho cities with the youngest median age (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

01Rexburg, IDID40,33422.8+12%

02Moscow, IDID26,72126.6+9%

03Rigby, IDID5,75728.50%

04Jerome, IDID13,73130.1−3%

05Shelley, IDID5,30330.6+13%

06Ammon, IDID20,11930.8+7%

07Kuna, IDID31,52530.9+18%

08Caldwell, IDID76,62931.0+8%

09Burley, IDID12,40931.6+2%

10Kimberly, IDID5,79832.0−4%

11Mountain Home, IDID16,77932.5+3%

12Rupert, IDID6,46032.7+3%

13Chubbuck, IDID16,82332.9+12%

14Nampa, IDID120,38433.1+16%

15Pocatello, IDID58,77133.4+16%

16Preston, IDID6,17733.4+18%

17Blackfoot, IDID13,36133.8+9%

18Idaho Falls, IDID71,78534.1+6%

19Middleton, IDID12,60034.2+23%

20Twin Falls, IDID56,21634.2+1%

21Meridian, IDID142,98835.7+19%

22Fruitland, IDID7,21335.8+14%

23Post Falls, IDID46,71535.8+14%

24Rathdrum, IDID13,22735.9+26%

25Boise City, IDID238,42937.1+13%

26Emmett, IDID8,90038.2+10%

27Payette, IDID8,81338.6+19%

28Coeur d'Alene, IDID58,17938.7+11%

29Hailey, IDID10,05338.8+17%

30Lewiston, IDID34,71739.9+5%

31Star, IDID20,87440.5+43%

32Sandpoint, IDID10,64542.3+16%

33Weiser, IDID6,24942.4+18%

34Hayden, IDID17,36343.2+22%

35Eagle, IDID34,65845.8+30%

36Garden City, IDID13,04747.0+33%

SHOWING 1–36 OF 36

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