Carroll County, Illinois Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 68th-largest in Illinois

The population of Carroll County, Illinois is 15,621 as of the 2023 American Community Survey, making it the 68th-largest county in Illinois. The median household income is $60,871, the median home value is $113,500, and the median age is 44.9.

The population of Carroll County has grown 0.3% since 2010 (15,395 → 15,444), a +0.02% annualized rate.

Carroll County within Illinois · Source: US Census TIGER/Line via us-atlas

15,621

Population

+0.02%

Annual growth

People / sq mi

$60,871

Median Income

$113,500

Median Home Value

Carroll County covers 445 sq mi of land at 35.1 people per square mile.

About Carroll County, IL

Carroll County is a county in Illinois with a population of 15,621. It ranks #68 among counties in Illinois by population. The median age is 44.9, older than the national median. The population is 54.4% male and 45.6% female.

The median household income in Carroll County is $60,871, below the US median of $74,580. 8.2% of residents live below the federal poverty level. Home values sit at a median of $113,500, with monthly rent averaging $784. The homeownership rate of 77.8% is higher than the national rate of 64.8%.

Educational attainment in Carroll County reflects 18.2% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 6.3% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 22.2 minutes each way.

Carroll County Population History (2010-2024)

The county of Carroll County had a population of 15,395 in 2010 and 15,444 in 2024, a 0.3% growth over 14 years. The peak was 15,712 in 2021. Average annual growth rate: 0.06%.

15,444

Population (2024)

15,395

Population (2010)

15,712

Peak (2021)

0.06%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	15,395	-	-	estimate
2011	15,229	-166	-1.08%	estimate
2012	15,121	-108	-0.71%	estimate
2013	14,969	-152	-1.01%	estimate
2014	14,783	-186	-1.24%	estimate
2015	14,638	-145	-0.98%	estimate
2016	14,601	-37	-0.25%	estimate
2017	14,473	-128	-0.88%	estimate
2018	14,337	-136	-0.94%	estimate
2019	14,338	+1	+0.01%	estimate
2020	15,678	+1,340	+9.35%	estimate
2021	15,712	+34	+0.22%	estimate
2022	15,553	-159	-1.01%	estimate
2023	15,492	-61	-0.39%	estimate
2024	15,444	-48	-0.31%	estimate

Race & Ethnicity

White	90.8%
Black or African American	3.9%
Asian	0.0%
Hispanic or Latino (any race)	0.9%
Two or More Races	0.0%

Age & Sex

44.9

Median Age

45.6%

Female

54.4%

Male

24.0%

Age 65+

Age Distribution

Under 5

4.3%

5–9

5.3%

10–14

5.1%

15–19

5.2%

20–24

6.4%

25–34

11.4%

35–44

12.4%

45–54

11.6%

55–59

6.9%

60–64

7.3%

65–74

13.9%

75–84

7.7%

85+

2.4%

Children (under 15): 14.7% · Seniors (65+): 24.0%

Income & Poverty

Median household income	$60,871$-20,831 vs state
Mean household income	$79,017
Per-capita income	$32,921
Poverty rate	8.2%
Unemployment rate	2.3%
Employment-to-population	50.5%

Top Industries by Employment

Manufacturing

22.1%

Professional & business services

20.2%

Retail trade

7.4%

Education & health care

6.7%

Public administration

5.3%

Agriculture

5.3%

Construction

4.9%

Finance & real estate

4.8%

The largest employment sector in Carroll County is manufacturing, accounting for 22.1% of workers.

How residents commute

0.9%

Drive alone

3.6%

Carpool

80.9%

Public transit

6.3%

Work from home

22.2 min

Avg commute

Housing

$113,500$-137,000 vs state

Median home value

$784

Median rent

77.8%

Homeownership rate

8,190

Total housing units

79.1%

Occupied

20.9%

Vacant

22.2%

Renter-occupied

Social & access

93.2%

With health insurance

91.5%

With broadband internet

31.7%

Foreign-born

9.4%

Veterans (18+)

15.9%

With a disability

94.8%

Speak language other than English at home

Education

87.7%

High School+

18.2%

Bachelor's+

Largest cities in Illinois

Chicago (2,707,648)Aurora (179,867)Joliet (149,785)Naperville (149,424)Rockford (147,649)Elgin (114,106)Springfield (113,714)Peoria (112,126)Waukegan (88,919)Champaign (88,822)All Illinois cities →

Other counties in Illinois

Cook County (5,185,812)DuPage County (927,263)Lake County (711,885)Will County (698,450)Kane County (516,097)McHenry County (311,366)Winnebago County (283,289)Madison County (264,631)St. Clair County (254,777)Champaign County (206,098)All Illinois counties →

Part of Illinois

Illinois demographic profile All Illinois data →

Metro areas in Illinois

Chicago (9,359,555)St. Louis (2,809,414)Davenport (381,864)Peoria (365,773)Rockford (336,605)Champaign (236,196)Springfield (207,386)Bloomington (170,882)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Carroll County, Illinois has a population of 15,621 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 68th-largest county in Illinois. Population density is 35 people per square mile.

The population of Carroll County has grown 0.3% since 2010 (15,395 → 15,444), a +0.02% annualized rate.

The median household income in Carroll County, Illinois is $60,871, with mean (average) household income of $79,017 and per-capita income of $32,921. 8.2% of residents live below the federal poverty level.

In Carroll County, the largest racial and ethnic groups are White (90.8%), Black or African American (3.9%), Hispanic or Latino (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Carroll County, Illinois is 44.9 years. Residents are 45.6% female and 54.4% male.

The median home value in Carroll County is $113,500 and median monthly rent is $784. 77.8% of occupied housing units are owner-occupied. The county has 8,190 total housing units, 20.9% of which are vacant.

The largest employment sector in Carroll County, Illinois is manufacturing, employing 22.1% of workers. The unemployment rate is 2.3%.

Chicago is among the largest cities associated with Carroll County, Illinois, with a population of 2,707,648.