RANKING · 2020 CENSUS · 102 SHOWN OF 102

Largest senior population, Illinois counties · 2020

Illinois counties home to the most residents aged 65 and over as of 2020. Ranked by number of people, not the senior share. This list covers the 102 counties in Illinois that qualify, ranked against each other statewide.

IllinoisAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 2000

01Cook County, ILIL5,194,625794,459+26%

02DuPage County, ILIL934,298154,145+74%

03Lake County, ILIL719,339107,049+95%

04Will County, ILIL712,25398,120+136%

05Kane County, ILIL525,75775,710+123%

06Winnebago County, ILIL283,67451,229+45%

07McHenry County, ILIL317,75148,379+131%

08Madison County, ILIL263,11048,167+30%

09St. Clair County, ILIL250,70842,670+27%

10Sangamon County, ILIL194,17036,697+44%

11Peoria County, ILIL178,55332,516+25%

12Rock Island County, ILIL141,86928,738+27%

13Champaign County, ILIL209,97227,425+57%

14Tazewell County, ILIL130,04926,017+36%

15McLean County, ILIL171,41924,590+68%

16LaSalle County, ILIL107,77321,575+18%

17Macon County, ILIL99,30021,271+22%

18Kankakee County, ILIL105,52518,944+39%

19Vermilion County, ILIL71,25915,011+12%

20Kendall County, ILIL145,47014,347+210%

21DeKalb County, ILIL101,83514,332+65%

22Adams County, ILIL64,26713,479+12%

23Williamson County, ILIL67,22513,443+33%

24Whiteside County, ILIL54,12112,332+27%

25Knox County, ILIL47,76711,085+13%

26Henry County, ILIL48,09510,550+26%

27Stephenson County, ILIL43,22010,547+31%

28Ogle County, ILIL51,3999,853+44%

29Macoupin County, ILIL43,7489,716+13%

30Jackson County, ILIL52,5019,116+39%

31Coles County, ILIL46,6078,895+26%

32Boone County, ILIL53,5688,633+93%

33Franklin County, ILIL36,9168,265+13%

34Marion County, ILIL36,3827,998+15%

35Grundy County, ILIL54,0527,977+73%

36Jefferson County, ILIL36,1477,512+23%

37Woodford County, ILIL38,1117,463+42%

38Bureau County, ILIL32,5107,434+18%

39Fulton County, ILIL32,9017,385+5%

40Livingston County, ILIL35,0577,157+18%

41Christian County, ILIL33,4437,031+15%

42Morgan County, ILIL32,5156,862+20%

43Lee County, ILIL32,9146,829+29%

44Clinton County, ILIL37,1286,723+31%

45Effingham County, ILIL34,5196,632+39%

46Monroe County, ILIL34,8406,595+78%

47Jo Daviess County, ILIL21,5946,165+54%

48Randolph County, ILIL29,9216,114+16%

49Iroquois County, ILIL26,1506,059+7%

50Montgomery County, ILIL28,0766,001+15%

51Logan County, ILIL27,1825,556+18%

52McDonough County, ILIL25,9165,410+16%

53Saline County, ILIL22,7725,158+2%

54Shelby County, ILIL20,5764,859+19%

55Jersey County, ILIL21,1604,533+46%

56Perry County, ILIL20,1604,288+16%

57Hancock County, ILIL16,8034,215+15%

58Fayette County, ILIL20,7903,974+15%

59Crawford County, ILIL18,6483,923+15%

60Edgar County, ILIL16,3233,888+11%

61Union County, ILIL16,6563,847+20%

62Carroll County, ILIL15,4193,790+18%

63Douglas County, ILIL19,8803,714+17%

64Wayne County, ILIL15,8823,544+10%

65Warren County, ILIL16,2223,540+16%

66Piatt County, ILIL16,7913,525+39%

67Mercer County, ILIL15,2293,501+30%

68Richland County, ILIL15,2193,430+21%

69Pike County, ILIL14,2313,351+0%

70White County, ILIL13,2503,324+4%

71Clark County, ILIL15,1143,236+6%

72Bond County, ILIL16,9593,156+22%

73De Witt County, ILIL15,1183,126+17%

74Mason County, ILIL12,4113,070+11%

75Moultrie County, ILIL14,3713,038+20%

76Massac County, ILIL13,5023,012+12%

77Lawrence County, ILIL13,7902,921−6%

78Washington County, ILIL13,5642,907+15%

79Ford County, ILIL13,2162,872+4%

80Clay County, ILIL12,7932,819+1%

81Marshall County, ILIL11,4732,807+14%

82Johnson County, ILIL13,3632,675+53%

83Greene County, ILIL11,3132,573−0%

84Menard County, ILIL11,8632,484+51%

85Wabash County, ILIL10,9072,455+12%

86Cass County, ILIL12,4632,246+4%

87Cumberland County, ILIL10,2082,161+21%

88Jasper County, ILIL9,0321,990+19%

89Hamilton County, ILIL7,8591,738+5%

90Henderson County, ILIL5,9841,658+21%

91Schuyler County, ILIL6,6571,626+17%

92Edwards County, ILIL5,8981,364+6%

93Alexander County, ILIL4,5701,298−20%

94Putnam County, ILIL5,6191,271+31%

95Stark County, ILIL5,3191,250+3%

96Gallatin County, ILIL4,6161,224+4%

97Pulaski County, ILIL4,8201,188−7%

98Calhoun County, ILIL4,3001,123+15%

99Hardin County, ILIL3,5881,067+19%

100Pope County, ILIL3,6721,026+31%

101Scott County, ILIL4,8661,005+10%

102Brown County, ILIL6,401987+12%

SHOWING 1–102 OF 102

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