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About this map

Half of residents are older than this, half younger. Retirement areas run 50+, college towns can be in the low 20s.

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024).

U.S.
38.9
Illinois
39
Rankings
Full list

Top and bottom zip codes in Illinois

Zip codes with 1,000+ residents

Oldest zip codes (highest median age)

See all
  1. 161036Galena58.8
  2. 261469Oquawka58.6
  3. 362938Golconda58.1
  4. 462865Mulkeytown57.3
  5. 560523Oak Brook57.1
  6. 662571Tower Hill56.9
  7. 761001Apple River56.4
  8. 860464Palos Park56.1
  9. 962931Elizabethtown55.7
  10. 1062330Dallas City55.5

Youngest zip codes (lowest median age)

See all
  1. 160088Great Lakes21.1
  2. 262028Elsah21.8
  3. 361820Champaign21.9
  4. 461606Peoria23.4
  5. 561801Urbana24.2
  6. 662903Carbondale24.6
  7. 761761Normal25.1
  8. 862901Carbondale25.2
  9. 962225Scott Air Force Base25.8
  10. 1060115Dekalb26.4

Median age by county in Illinois

  1. 1Pope County53.9
  2. 2Hardin County53.6
  3. 3Jo Daviess County51.5
  4. 4Henderson County50.2
  5. 5Schuyler County49.1
  6. 6Calhoun County48.8
  7. 7Alexander County48
  8. 8Putnam County47.4
  9. 9Hancock County46.9
  10. 10Gallatin County46.7
  11. 11Edgar County46.6
  12. 12Marshall County46.1
  13. 13Scott County46
  14. 14Carroll County45.4
  15. 15Mason County45.4
  16. 16Shelby County45.3
  17. 17Stephenson County45.3
  18. 18Edwards County44.7
  19. 19Massac County44.7
  20. 20Mercer County44.7
  21. 21Iroquois County44.4
  22. 22Stark County44.4
  23. 23Jasper County44.3
  24. 24Union County44.3
  25. 25White County44.3
  26. 26Macoupin County44.2
  27. 27Washington County44.2
  28. 28Bureau County44.1
  29. 29Fulton County43.9
  30. 30Hamilton County43.9
  31. 31Saline County43.8
  32. 32De Witt County43.7
  33. 33Jersey County43.7
  34. 34Randolph County43.7
  35. 35Henry County43.6
  36. 36Franklin County43.4
  37. 37Greene County43.4
  38. 38Christian County43.2
  39. 39Monroe County43.2
  40. 40Wabash County43.2
  41. 41Cumberland County43.1
  42. 42Lee County43.1
  43. 43Pike County43
  44. 44Pulaski County43
  45. 45Whiteside County43
  46. 46Menard County42.8
  47. 47Montgomery County42.8
  48. 48Piatt County42.8
  49. 49Wayne County42.8
  50. 50Clark County42.6
  51. 51Crawford County42.6
  52. 52Knox County42.6
  53. 53Richland County42.3
  54. 54LaSalle County42.2
  55. 55Ogle County42.2
  56. 56Perry County42
  57. 57Fayette County41.9
  58. 58Ford County41.9
  59. 59Tazewell County41.9
  60. 60Livingston County41.8
  61. 61Williamson County41.6
  62. 62Clinton County41.5
  63. 63Marion County41.5
  64. 64Adams County41.4
  65. 65Johnson County41.4
  66. 66Vermilion County41.3
  67. 67Jefferson County41.2
  68. 68Logan County41.1
  69. 69Morgan County41.1
  70. 70Brown County41
  71. 71Sangamon County41
  72. 72Lawrence County40.7
  73. 73McHenry County40.7
  74. 74Macon County40.6
  75. 75Clay County40.4
  76. 76Woodford County40.4
  77. 77Rock Island County40.3
  78. 78DuPage County40.2
  79. 79Madison County40.2
  80. 80Moultrie County40.1
  81. 81Effingham County40
  82. 82St. Clair County39.9
  83. 83Bond County39.7
  84. 84Boone County39.7
  85. 85Winnebago County39.6
  86. 86Lake County39.1
  87. 87Will County39.1
  88. 88Kankakee County39
  89. 89Kane County38.8
  90. 90Douglas County38.7
  91. 91Warren County38.5
  92. 92Cass County38.3
  93. 93Grundy County38.3
  94. 94Peoria County38.1
  95. 95Cook County38
  96. 96Coles County37.5
  97. 97Kendall County36.3
  98. 98McDonough County34.9
  99. 99McLean County34.3
  100. 100DeKalb County32.7
  101. 101Jackson County32.4
  102. 102Champaign County30.7

Questions about this map

Which zip code has the highest median age in Illinois?

Among zip codes with at least 1,000 residents, 61036 (Galena, IL) has the highest: 58.8.

Which zip code has the lowest median age in Illinois?

60088 (Great Lakes, IL) has the lowest: 21.1.

What is the median age for the United States?

38.9; in Illinois it is 39.

Where does this data come from?

U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024). Half of residents are older than this, half younger. Retirement areas run 50+, college towns can be in the low 20s.

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