Cumberland County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 87th-largest in Illinois
The population of Cumberland County, Illinois is 10,378 as of the 2023 American Community Survey, making it the 87th-largest county in Illinois. The median household income is $69,826, the median home value is $117,700, and the median age is 42.3.
The population of Cumberland County has declined 6.8% since 2010 (11,053 → 10,305), a -0.50% annualized rate.
10,378
Population
-0.50%
Annual growth
30
People / sq mi
$69,826
Median Income
$117,700
Median Home Value
Cumberland County covers 346 sq mi of land at 30.0 people per square mile.
About Cumberland County, IL
Cumberland County is a county in Illinois with a population of 10,378. It ranks #87 among counties in Illinois by population. The median age is 42.3, older than the national median. The population is 51.5% male and 48.5% female.
The median household income in Cumberland County is $69,826, below the US median of $74,580. 5.5% of residents live below the federal poverty level. Home values sit at a median of $117,700, with monthly rent averaging $756. The homeownership rate of 83.5% is higher than the national rate of 64.8%.
Educational attainment in Cumberland County reflects 18.6% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 7.4% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 24.1 minutes each way.
Cumberland County Population History (2010-2024)
The county of Cumberland County had a population of 11,053 in 2010 and 10,305 in 2024, a -6.8% growth over 14 years. The peak was 11,084 in 2011. Average annual growth rate: -0.50%.
10,305
Population (2024)
11,053
Population (2010)
11,084
Peak (2011)
-0.50%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 11,053 |
| 2011 | 11,084 |
| 2012 | 10,955 |
| 2013 | 10,911 |
| 2014 | 10,931 |
| 2015 | 10,869 |
| 2016 | 10,884 |
| 2017 | 10,887 |
| 2018 | 10,782 |
| 2019 | 10,733 |
| 2020 | 10,437 |
| 2021 | 10,358 |
| 2022 | 10,296 |
| 2023 | 10,272 |
| 2024 | 10,305 |
Race & Ethnicity
| White | 96.0% |
| Black or African American | 0.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
42.3
Median Age
48.5%
Female
51.5%
Male
20.3%
Age 65+
Age Distribution
Children (under 15): 19.8% · Seniors (65+): 20.3%
Income & Poverty
| Median household income | $69,826$-11,876 vs state |
| Mean household income | $88,805 |
| Per-capita income | $36,270 |
| Poverty rate | 5.5%-2.7% vs state |
| Unemployment rate | 1.6% |
| Employment-to-population | 65.6% |
Top Industries by Employment
The largest employment sector in Cumberland County is professional & business services, accounting for 21.8% of workers.
How residents commute
0.0%
Drive alone
4.0%
Carpool
82.8%
Public transit
7.4%
Work from home
24.1 min
Avg commute
Housing
$117,700$-132,800 vs state
Median home value
$756
Median rent
83.5%
Homeownership rate
4,720
Total housing units
88.6%
Occupied
11.4%
Vacant
16.5%
Renter-occupied
Social & access
94.4%
With health insurance
91.5%
With broadband internet
14.0%
Foreign-born
6.1%
Veterans (18+)
13.4%
With a disability
99.1%
Speak language other than English at home
Education
93.9%
High School+
18.6%
Bachelor's+
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County rankings
Frequently Asked Questions
Cumberland County, Illinois has a population of 10,378 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 87th-largest county in Illinois. Population density is 30 people per square mile.
The population of Cumberland County has declined 6.8% since 2010 (11,053 → 10,305), a -0.50% annualized rate.
The median household income in Cumberland County, Illinois is $69,826, with mean (average) household income of $88,805 and per-capita income of $36,270. 5.5% of residents live below the federal poverty level.
In Cumberland County, the largest racial and ethnic groups are White (96.0%), Hispanic or Latino (0.9%), Black or African American (0.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Cumberland County, Illinois is 42.3 years. Residents are 48.5% female and 51.5% male.
The median home value in Cumberland County is $117,700 and median monthly rent is $756. 83.5% of occupied housing units are owner-occupied. The county has 4,720 total housing units, 11.4% of which are vacant.
The largest employment sector in Cumberland County, Illinois is professional, scientific, and management services, employing 21.8% of workers. The unemployment rate is 1.6%.
Chicago is among the largest cities associated with Cumberland County, Illinois, with a population of 2,707,648.
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Statewide data for Illinois
Population, race, income, age, and trends across Illinois
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.