Data / Rankings / Population aged 65 and over / Counties in Illinois

Counties in Illinois by share of population aged 65 and over

Pope County had the highest share of population aged 65 and over of 102 counties in 2024, at 31%. Kendall County had the lowest, at 12.1%. The median was 22.5% and the figure for Illinois was 18.3%. Source: the U.S. Census Bureau.

Highest31Pope County
Lowest12.1Kendall County
Median22.5102 counties
Illinois18.3History

Top 40 counties, 2024

CSVChart (SVG)

Pope CountyPope County: 31 %31Jo Daviess CountyJo Daviess County: 31 %31Hardin CountyHardin County: 30.8 %30.8Henderson CountyHenderson County: 29.1 %29.1Alexander CountyAlexander County: 27.9 %27.9Schuyler CountySchuyler County: 27.4 %27.4Calhoun CountyCalhoun County: 27 %27Gallatin CountyGallatin County: 26.7 %26.7Hancock CountyHancock County: 26.6 %26.6Putnam CountyPutnam County: 26 %26Carroll CountyCarroll County: 25.8 %25.8Stephenson CountyStephenson County: 25.6 %25.6Marshall CountyMarshall County: 25.5 %25.5Scott CountyScott County: 25.5 %25.5Edgar CountyEdgar County: 25.2 %25.2Shelby CountyShelby County: 25 %25Mason CountyMason County: 24.7 %24.7White CountyWhite County: 24.6 %24.6Pulaski CountyPulaski County: 24.6 %24.6Bureau CountyBureau County: 24.5 %24.5Iroquois CountyIroquois County: 24.4 %24.4Washington CountyWashington County: 24.1 %24.1Union CountyUnion County: 24.1 %24.1Edwards CountyEdwards County: 24.1 %24.1Wabash CountyWabash County: 24 %24Macoupin CountyMacoupin County: 23.8 %23.8Whiteside CountyWhiteside County: 23.8 %23.8Saline CountySaline County: 23.7 %23.7Jersey CountyJersey County: 23.7 %23.7Henry CountyHenry County: 23.6 %23.6Massac CountyMassac County: 23.6 %23.6Knox CountyKnox County: 23.6 %23.6Mercer CountyMercer County: 23.6 %23.6Stark CountyStark County: 23.6 %23.6Fulton CountyFulton County: 23.5 %23.5Piatt CountyPiatt County: 23.4 %23.4Hamilton CountyHamilton County: 23.4 %23.4Jasper CountyJasper County: 23.3 %23.3Cumberland CountyCumberland County: 23.2 %23.2Greene CountyGreene County: 23.2 %23.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2024 (%)Change on 2023
1Pope County310 pts
2Jo Daviess County31+0.8 pts
3Hardin County30.8+0.7 pts
4Henderson County29.1+0.8 pts
5Alexander County27.9+1.3 pts
6Schuyler County27.4+0.8 pts
7Calhoun County27+0.7 pts
8Gallatin County26.70 pts
9Hancock County26.6+0.7 pts
10Putnam County26+0.9 pts
11Carroll County25.8+0.5 pts
12Stephenson County25.6+0.4 pts
13Marshall County25.5+0.5 pts
14Scott County25.5+0.6 pts
15Edgar County25.2+0.4 pts
16Shelby County25+0.4 pts
17Mason County24.7+0.4 pts
18White County24.6+0.3 pts
19Pulaski County24.6+0.4 pts
20Bureau County24.5+0.5 pts
21Iroquois County24.4+0.4 pts
22Washington County24.1+0.6 pts
23Union County24.1+0.2 pts
24Edwards County24.1+0.7 pts
25Wabash County24+0.3 pts
26Macoupin County23.8+0.3 pts
27Whiteside County23.8+0.3 pts
28Saline County23.7+0.4 pts
29Jersey County23.7+0.5 pts
30Henry County23.6+0.5 pts
31Massac County23.6+0.7 pts
32Knox County23.6+0.3 pts
33Mercer County23.6+0.4 pts
34Stark County23.6-0.1 pts
35Fulton County23.5+0.2 pts
36Piatt County23.4+0.7 pts
37Hamilton County23.4+0.6 pts
38Jasper County23.3+0.4 pts
39Cumberland County23.2+0.5 pts
40Greene County23.2+0.4 pts
41Clay County23.2+0.5 pts
42Pike County23.1+0.2 pts
43Montgomery County23+0.5 pts
44Franklin County22.9+0.4 pts
45Richland County22.8+0.4 pts
46Wayne County22.8+0.2 pts
47Menard County22.8+0.6 pts
48Marion County22.7+0.5 pts
49Clark County22.7+0.3 pts
50Lee County22.7+0.7 pts
51Christian County22.7+0.5 pts
52Ford County22.4+0.1 pts
53Moultrie County22.4+0.3 pts
54Adams County22.4+0.6 pts
54Macon County22.4+0.3 pts
56Morgan County22.3+0.6 pts
57Livingston County22.2+0.6 pts
58Crawford County22.2+0.1 pts
59Warren County22.2+0.5 pts
60Perry County22.1+0.7 pts
61LaSalle County22.1+0.6 pts
62Randolph County22+0.4 pts
63De Witt County22+0.3 pts
64Monroe County22+0.8 pts
65Jefferson County21.9+0.5 pts
66Williamson County21.9+0.4 pts
67Vermilion County21.6+0.4 pts
68Johnson County21.6+0.7 pts
69Woodford County21.6+0.6 pts
70Lawrence County21.5-0.2 pts
71Logan County21.50 pts
72Rock Island County21.5+0.2 pts
73Tazewell County21.4+0.4 pts
74McDonough County21.3+0.8 pts
75Ogle County21.1+0.5 pts
76Effingham County21.1+0.6 pts
77Sangamon County20.9+0.5 pts
78Bond County20.7+0.5 pts
79Coles County20.6+0.5 pts
80Clinton County20.5+0.5 pts
81Fayette County20.3+0.4 pts
82Madison County20.1+0.5 pts
83Douglas County20+0.4 pts
84Kankakee County19.7+0.4 pts
85Winnebago County19.5+0.4 pts
86Peoria County19.4+0.3 pts
87St. Clair County19+0.6 pts
88DuPage County18.9+0.5 pts
89Cass County18.7+0.3 pts
90Jackson County18.5+0.2 pts
91Boone County18.3+0.5 pts
92McHenry County18.2+0.7 pts
93Brown County17.6+0.7 pts
94Lake County17.3+0.5 pts
95Cook County16.9+0.3 pts
96Grundy County16.8+0.5 pts
97Kane County16.8+0.5 pts
98McLean County16.3+0.4 pts
99DeKalb County16.2+0.4 pts
100Will County16.2+0.5 pts
101Champaign County14.8+0.4 pts
102Kendall County12.1+0.3 pts

Other periods

About this ranking

Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.

Use this data in your AI agent

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Rank Counties in Illinois by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"Illinois","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_65_plus_share&level=province&within=Illinois&limit=10

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Questions

Which county has the highest share of population aged 65 and over?

Pope County, with 31% in 2024, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Kendall County, with 12.1% in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in Illinois: more rankings