RANKING · 2010 CENSUS · 36 SHOWN OF 36

Oldest by median age, Idaho cities · 2010

Idaho cities ranked by median age of residents (2010 ACS). This list covers the 36 cities in Idaho that qualify, ranked against each other statewide. The median across all 36 is 32.2.

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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, IDID13,04743.2+22%

02Eagle, IDID34,65840.6+15%

03Lewiston, IDID34,71739.9+5%

04Hayden, IDID17,36339.4+12%

05Sandpoint, IDID10,64538.8+6%

06Weiser, IDID6,24938.7+8%

07Emmett, IDID8,90036.3+5%

08Coeur d'Alene, IDID58,17935.4+2%

09Boise City, IDID238,42935.3+8%

10Hailey, IDID10,05335.1+5%

11Payette, IDID8,81335.0+8%

12Rupert, IDID6,46033.3+5%

13Post Falls, IDID46,71533.0+5%

14Fruitland, IDID7,21332.7+4%

15Meridian, IDID142,98832.5+8%

16Rathdrum, IDID13,22732.3+13%

17Star, IDID20,87432.3+14%

18Idaho Falls, IDID71,78532.20%

19Kimberly, IDID5,79831.9−5%

20Twin Falls, IDID56,21631.9−6%

21Preston, IDID6,17731.7+12%

22Blackfoot, IDID13,36130.80%

23Burley, IDID12,40930.80%

24Middleton, IDID12,60030.5+10%

25Chubbuck, IDID16,82330.2+3%

26Pocatello, IDID58,77130.2+5%

27Nampa, IDID120,38430.1+6%

28Mountain Home, IDID16,77929.8−6%

29Ammon, IDID20,11929.6+3%

30Jerome, IDID13,73128.9−7%

31Caldwell, IDID76,62928.2−2%

32Kuna, IDID31,52528.1+8%

33Shelley, IDID5,30327.8+3%

34Rigby, IDID5,75727.6−3%

35Moscow, IDID26,72124.2−1%

36Rexburg, IDID40,33422.3+10%

SHOWING 1–36 OF 36

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