Data / Rankings / Population aged 18 to 64 / Counties in Illinois

Counties in Illinois by population aged 18 to 64

Champaign County had the highest population aged 18 to 64 of 102 counties in 2022, at 66.9%. Hardin County had the lowest, at 51.6%. The median was 56.7% and the figure for Illinois was 61.1%. Source: the U.S. Census Bureau.

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Highest66.9Champaign County
Lowest51.6Hardin County
Median56.7102 counties
Illinois61.1History

Map of counties, 2022

Adams County: 56.4 %Alexander County: 54.2 %Bond County: 62.3 %Boone County: 58.9 %Brown County: 66.7 %Bureau County: 56.1 %Calhoun County: 53.4 %Carroll County: 57.4 %Cass County: 57.8 %Champaign County: 66.9 %Christian County: 59 %Clark County: 55.8 %Clay County: 55.1 %Clinton County: 58.8 %Coles County: 60.9 %Cook County: 63.4 %Crawford County: 58.2 %Cumberland County: 55.5 %DeKalb County: 62.6 %De Witt County: 57.5 %Douglas County: 55.9 %DuPage County: 60.4 %Edgar County: 55 %Edwards County: 55.1 %Effingham County: 56.6 %Fayette County: 59.6 %Ford County: 55.5 %Franklin County: 56.3 %Fulton County: 57.9 %Gallatin County: 54.7 %Greene County: 55.7 %Grundy County: 59.9 %Hamilton County: 54.9 %Hancock County: 53.6 %Hardin County: 51.6 %Henderson County: 53.6 %Henry County: 55.3 %Iroquois County: 55.2 %Jackson County: 62.5 %Jasper County: 55 %Jefferson County: 57.1 %Jersey County: 57.6 %Jo Daviess County: 52.3 %Johnson County: 62.7 %Kane County: 60.3 %Kankakee County: 58.7 %Kendall County: 61.2 %Knox County: 57.3 %Lake County: 60.8 %LaSalle County: 58.3 %Lawrence County: 57.9 %Lee County: 58.9 %Livingston County: 57.4 %Logan County: 59.5 %McDonough County: 61 %McHenry County: 60.7 %McLean County: 63.6 %Macon County: 56.2 %Macoupin County: 56.7 %Madison County: 59.7 %Marion County: 55.1 %Marshall County: 54.9 %Mason County: 56.4 %Massac County: 56 %Menard County: 56.6 %Mercer County: 56.1 %Monroe County: 57.2 %Montgomery County: 57.9 %Morgan County: 59.8 %Moultrie County: 54 %Ogle County: 57.8 %Peoria County: 58 %Perry County: 60.1 %Piatt County: 55.8 %Pike County: 54.1 %Pope County: 53.3 %Pulaski County: 55.8 %Putnam County: 57.3 %Randolph County: 58.9 %Richland County: 55.6 %Rock Island County: 56.9 %St. Clair County: 59.1 %Saline County: 55.7 %Sangamon County: 58.4 %Schuyler County: 56.5 %Scott County: 56.1 %Shelby County: 54.6 %Stark County: 54.7 %Stephenson County: 54.3 %Tazewell County: 57.3 %Union County: 56.2 %Vermilion County: 56.1 %Wabash County: 55.1 %Warren County: 56.6 %Washington County: 56.1 %Wayne County: 55 %White County: 54.7 %Whiteside County: 55.4 %Will County: 61.4 %Williamson County: 57.6 %Winnebago County: 58.3 %Woodford County: 55.6 %
  • Under 55
  • 55 to 56
  • 56 to 57
  • 57 to 58
  • 58 to 60
  • 60 and over
%, 2022. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2022

Champaign County: 66.9 %Champaign County66.9Brown County: 66.7 %Brown County66.7McLean County: 63.6 %McLean County63.6Cook County: 63.4 %Cook County63.4Johnson County: 62.7 %Johnson County62.7DeKalb County: 62.6 %DeKalb County62.6Jackson County: 62.5 %Jackson County62.5Bond County: 62.3 %Bond County62.3Will County: 61.4 %Will County61.4Kendall County: 61.2 %Kendall County61.2McDonough County: 61 %McDonough County61Coles County: 60.9 %Coles County60.9Lake County: 60.8 %Lake County60.8McHenry County: 60.7 %McHenry County60.7DuPage County: 60.4 %DuPage County60.4Kane County: 60.3 %Kane County60.3Perry County: 60.1 %Perry County60.1Grundy County: 59.9 %Grundy County59.9Morgan County: 59.8 %Morgan County59.8Madison County: 59.7 %Madison County59.7Fayette County: 59.6 %Fayette County59.6Logan County: 59.5 %Logan County59.5St. Clair County: 59.1 %St. Clair County59.1Christian County: 59 %Christian County59Boone County: 58.9 %Boone County58.9Randolph County: 58.9 %Randolph County58.9Lee County: 58.9 %Lee County58.9Clinton County: 58.8 %Clinton County58.8Kankakee County: 58.7 %Kankakee County58.7Sangamon County: 58.4 %Sangamon County58.4LaSalle County: 58.3 %LaSalle County58.3Winnebago County: 58.3 %Winnebago County58.3Crawford County: 58.2 %Crawford County58.2Peoria County: 58 %Peoria County58Fulton County: 57.9 %Fulton County57.9Lawrence County: 57.9 %Lawrence County57.9Montgomery County: 57.9 %Montgomery County57.9Cass County: 57.8 %Cass County57.8Ogle County: 57.8 %Ogle County57.8Williamson County: 57.6 %Williamson County57.6Champaign County: 66.9 %Champaign County66.9Brown County: 66.7 %Brown County66.7McLean County: 63.6 %McLean County63.6Cook County: 63.4 %Cook County63.4Johnson County: 62.7 %Johnson County62.7DeKalb County: 62.6 %DeKalb County62.6Jackson County: 62.5 %Jackson County62.5Bond County: 62.3 %Bond County62.3Will County: 61.4 %Will County61.4Kendall County: 61.2 %Kendall County61.2McDonough County: 61 %McDonough County61Coles County: 60.9 %Coles County60.9Lake County: 60.8 %Lake County60.8McHenry County: 60.7 %McHenry County60.7DuPage County: 60.4 %DuPage County60.4Kane County: 60.3 %Kane County60.3Perry County: 60.1 %Perry County60.1Grundy County: 59.9 %Grundy County59.9Morgan County: 59.8 %Morgan County59.8Madison County: 59.7 %Madison County59.7Fayette County: 59.6 %Fayette County59.6Logan County: 59.5 %Logan County59.5St. Clair County: 59.1 %St. Clair County59.1Christian County: 59 %Christian County59Boone County: 58.9 %Boone County58.9Randolph County: 58.9 %Randolph County58.9Lee County: 58.9 %Lee County58.9Clinton County: 58.8 %Clinton County58.8Kankakee County: 58.7 %Kankakee County58.7Sangamon County: 58.4 %Sangamon County58.4LaSalle County: 58.3 %LaSalle County58.3Winnebago County: 58.3 %Winnebago County58.3Crawford County: 58.2 %Crawford County58.2Peoria County: 58 %Peoria County58Fulton County: 57.9 %Fulton County57.9Lawrence County: 57.9 %Lawrence County57.9Montgomery County: 57.9 %Montgomery County57.9Cass County: 57.8 %Cass County57.8Ogle County: 57.8 %Ogle County57.8Williamson County: 57.6 %Williamson County57.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Champaign County66.9-0.1 pts
2Brown County66.7-0.3 pts
3McLean County63.6-0.2 pts
4Cook County63.4-0.1 pts
5Johnson County62.7-0.6 pts
6DeKalb County62.6-0.6 pts
7Jackson County62.5-0.5 pts
8Bond County62.3-0.5 pts
9Will County61.4-0.2 pts
10Kendall County61.2+0.2 pts
11McDonough County61-0.9 pts
12Coles County60.9-0.9 pts
13Lake County60.8-0.3 pts
14McHenry County60.7-0.5 pts
15DuPage County60.4-0.4 pts
16Kane County60.3-0.1 pts
17Perry County60.1+0.7 pts
18Grundy County59.9-0.2 pts
19Morgan County59.8-0.4 pts
20Madison County59.7-0.4 pts
21Fayette County59.6-0.1 pts
22Logan County59.5-0.3 pts
23St. Clair County59.1-0.4 pts
24Christian County59-0.2 pts
25Boone County58.9-0.2 pts
26Randolph County58.9-0.7 pts
27Lee County58.9-0.9 pts
28Clinton County58.8-0.6 pts
29Kankakee County58.7-0.5 pts
30Sangamon County58.4-0.6 pts
31LaSalle County58.3-0.5 pts
32Winnebago County58.3-0.4 pts
33Crawford County58.2+0.4 pts
34Peoria County58-0.4 pts
35Fulton County57.9-0.2 pts
36Lawrence County57.9-3.5 pts
37Montgomery County57.9-0.5 pts
38Cass County57.80 pts
39Ogle County57.8-0.3 pts
40Williamson County57.6-0.3 pts
41Jersey County57.6-0.4 pts
42De Witt County57.5-0.2 pts
43Carroll County57.4-0.3 pts
44Livingston County57.4-0.3 pts
45Putnam County57.3-0 pts
46Tazewell County57.3-0 pts
47Knox County57.3-0.1 pts
48Monroe County57.2-0.8 pts
49Jefferson County57.1-0.3 pts
50Rock Island County56.9-0.5 pts
51Macoupin County56.7-0.5 pts
52Warren County56.6-0.8 pts
53Effingham County56.6-0.4 pts
54Menard County56.6-0.1 pts
55Schuyler County56.5-0.6 pts
56Adams County56.4-0.3 pts
57Mason County56.4-0.1 pts
58Franklin County56.3-0.2 pts
59Union County56.2-0.3 pts
60Macon County56.2-0.4 pts
61Bureau County56.1-0.3 pts
62Vermilion County56.1-0.4 pts
63Washington County56.1-0.7 pts
64Mercer County56.1-0.2 pts
65Scott County56.1+0.1 pts
66Massac County56-0.2 pts
67Douglas County55.9-0.5 pts
68Clark County55.8-0.2 pts
69Pulaski County55.8+0.1 pts
70Piatt County55.8-0.5 pts
71Greene County55.7-0.1 pts
72Saline County55.7-0.1 pts
73Richland County55.6+0.1 pts
74Woodford County55.6-0.6 pts
75Cumberland County55.5-0.5 pts
76Ford County55.5-0.4 pts
77Whiteside County55.4-0.4 pts
78Henry County55.3-0.4 pts
79Iroquois County55.2-0.2 pts
80Clay County55.1-0.4 pts
81Marion County55.1-0.3 pts
82Edwards County55.1+0.1 pts
83Wabash County55.1-0.6 pts
84Wayne County55+0.2 pts
85Edgar County55-0.7 pts
86Jasper County55-0.5 pts
87Hamilton County54.9-0.5 pts
88Marshall County54.9-0.5 pts
89Stark County54.7-0.2 pts
90White County54.7-0.3 pts
91Gallatin County54.7-0.2 pts
92Shelby County54.6-0.2 pts
93Stephenson County54.3-0.4 pts
94Alexander County54.2-0.9 pts
95Pike County54.1+0.1 pts
96Moultrie County54-0.4 pts
97Hancock County53.6-0.6 pts
98Henderson County53.6-0.6 pts
99Calhoun County53.4-0.4 pts
100Pope County53.3-1 pts
101Jo Daviess County52.3-0.4 pts
102Hardin County51.6-0.6 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Illinois by population aged 18 to 64, 2022) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Illinois by population aged 18 to 64, 2022. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/illinois-counties?period=2022. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Illinois by population aged 18 to 64, 2022. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/illinois-counties?period=2022.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Illinois by population aged 18 to 64, 2022 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/illinois-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2022,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Illinois by population aged 18 to 64, 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/illinois-counties?period=2022. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Illinois by population aged 18 to 64, 2022
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/illinois-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/illinois-counties?period=2022.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Rank Counties in Illinois by population aged 18 to 64 using official data, and cite the source.
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Questions

Which county has the highest population aged 18 to 64?

Champaign County, with 66.9% in 2022, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Hardin County, with 51.6% in 2022.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in Illinois: more rankings