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 2023, at 31%. Kendall County had the lowest, at 11.8%. The median was 22.2% and the figure for Illinois was 17.9%. Source: the U.S. Census Bureau.

Highest31Pope County
Lowest11.8Kendall County
Median22.2102 counties
Illinois17.9History

Top 40 counties, 2023

CSVChart (SVG)

Pope CountyPope County: 31 %31Jo Daviess CountyJo Daviess County: 30.2 %30.2Hardin CountyHardin County: 30.1 %30.1Henderson CountyHenderson County: 28.3 %28.3Gallatin CountyGallatin County: 26.6 %26.6Alexander CountyAlexander County: 26.6 %26.6Schuyler CountySchuyler County: 26.6 %26.6Calhoun CountyCalhoun County: 26.3 %26.3Hancock CountyHancock County: 25.8 %25.8Carroll CountyCarroll County: 25.3 %25.3Stephenson CountyStephenson County: 25.2 %25.2Putnam CountyPutnam County: 25.1 %25.1Marshall CountyMarshall County: 25.1 %25.1Scott CountyScott County: 24.9 %24.9Edgar CountyEdgar County: 24.8 %24.8Shelby CountyShelby County: 24.6 %24.6White CountyWhite County: 24.3 %24.3Mason CountyMason County: 24.2 %24.2Pulaski CountyPulaski County: 24.2 %24.2Iroquois CountyIroquois County: 24 %24Bureau CountyBureau County: 24 %24Union CountyUnion County: 23.9 %23.9Stark CountyStark County: 23.7 %23.7Wabash CountyWabash County: 23.7 %23.7Washington CountyWashington County: 23.5 %23.5Whiteside CountyWhiteside County: 23.5 %23.5Macoupin CountyMacoupin County: 23.4 %23.4Edwards CountyEdwards County: 23.4 %23.4Fulton CountyFulton County: 23.3 %23.3Knox CountyKnox County: 23.3 %23.3Saline CountySaline County: 23.3 %23.3Henry CountyHenry County: 23.2 %23.2Mercer CountyMercer County: 23.2 %23.2Jersey CountyJersey County: 23.1 %23.1Massac CountyMassac County: 23 %23Pike CountyPike County: 22.9 %22.9Jasper CountyJasper County: 22.9 %22.9Hamilton CountyHamilton County: 22.8 %22.8Greene CountyGreene County: 22.8 %22.8Piatt CountyPiatt County: 22.7 %22.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2023 (%)Change on 2022
1Pope County31+0.9 pts
2Jo Daviess County30.2+0.6 pts
3Hardin County30.1+0.2 pts
4Henderson County28.3+0.7 pts
5Gallatin County26.6+0.8 pts
6Alexander County26.6+0.5 pts
7Schuyler County26.6+1 pts
8Calhoun County26.3+0.1 pts
9Hancock County25.8+0.7 pts
10Carroll County25.3+0.5 pts
11Stephenson County25.2+0.5 pts
12Putnam County25.1+0.8 pts
13Marshall County25.1+0.4 pts
14Scott County24.9+0.9 pts
15Edgar County24.8+0.2 pts
16Shelby County24.6+0.6 pts
17White County24.3+0.3 pts
18Mason County24.2+0.6 pts
19Pulaski County24.2+0.2 pts
20Iroquois County24+0.7 pts
21Bureau County24+0.6 pts
22Union County23.9+0.2 pts
23Stark County23.7-0.1 pts
24Wabash County23.7+0.5 pts
25Washington County23.5+0.8 pts
26Whiteside County23.5+0.4 pts
27Macoupin County23.4+0.6 pts
28Edwards County23.4+0.5 pts
29Fulton County23.3+0.5 pts
30Knox County23.3+0.3 pts
31Saline County23.3+0.5 pts
32Henry County23.2+0.6 pts
33Mercer County23.2+0.4 pts
34Jersey County23.1+0.8 pts
35Massac County23+0.6 pts
36Pike County22.9+0.3 pts
37Jasper County22.9+0.6 pts
38Hamilton County22.8+0.4 pts
39Greene County22.8+0.2 pts
40Piatt County22.7+0.4 pts
41Cumberland County22.7+0.7 pts
42Clay County22.6+0.6 pts
43Wayne County22.6+0.3 pts
44Montgomery County22.5+0.5 pts
45Franklin County22.5+0.2 pts
46Richland County22.5+0.4 pts
47Clark County22.4+0.5 pts
48Ford County22.3+0.5 pts
49Marion County22.3+0.5 pts
50Christian County22.2+0.7 pts
51Moultrie County22.2+0.2 pts
52Menard County22.2+0.6 pts
53Macon County22.1+0.5 pts
54Crawford County22.1+0.3 pts
55Lee County22+0.8 pts
56Adams County21.8+0.4 pts
57Morgan County21.7+0.4 pts
58De Witt County21.7+0.4 pts
59Warren County21.7+0.4 pts
60Lawrence County21.7-0.1 pts
61Randolph County21.7+0.6 pts
62Livingston County21.7+0.7 pts
63Williamson County21.5+0.3 pts
64LaSalle County21.5+0.6 pts
65Perry County21.5+0.4 pts
66Logan County21.4+0.5 pts
67Jefferson County21.4+0.5 pts
68Rock Island County21.3+0.3 pts
69Vermilion County21.3+0.3 pts
70Monroe County21.2+0.7 pts
71Tazewell County21.1+0.4 pts
72Woodford County20.9+0.4 pts
73Johnson County20.9+0.4 pts
74Ogle County20.7+0.6 pts
75Effingham County20.6+0.4 pts
76McDonough County20.5+0.1 pts
77Sangamon County20.4+0.5 pts
78Bond County20.2+0.6 pts
79Coles County20.1+0.4 pts
80Clinton County20+0.6 pts
81Fayette County20+0.4 pts
82Madison County19.7+0.5 pts
83Douglas County19.6+0.2 pts
84Kankakee County19.3+0.5 pts
85Winnebago County19.2+0.4 pts
86Peoria County19.1+0.3 pts
87Cass County18.4+0.2 pts
88St. Clair County18.4+0.6 pts
89DuPage County18.4+0.5 pts
90Jackson County18.3+0.5 pts
91Boone County17.8+0.5 pts
92McHenry County17.6+0.7 pts
93Brown County16.9+0.7 pts
94Lake County16.7+0.6 pts
95Cook County16.5+0.4 pts
96Grundy County16.3+0.4 pts
97Kane County16.3+0.5 pts
98McLean County15.8+0.5 pts
99DeKalb County15.8+0.4 pts
100Will County15.6+0.5 pts
101Champaign County14.4+0.4 pts
102Kendall County11.8+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

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

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 2023, according to the U.S. Census Bureau.

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

Kendall County, with 11.8% in 2023.

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