Adams County, Illinois Demographics 2026

Name: Adams County, Illinois Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Adams County, Illinois has a population of 64,754, the 23rd most populous county in Illinois. The median household income is $66,220 and the median home value is $162,600. The poverty rate is 12.8%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Adams County Quick Facts

Population 64,754

Median Household Income $66,220

Median Home Value $162,600

Poverty Rate 12.8%

Unemployment Rate 3.9%

Median Age 41.4 years

Homeownership Rate 72.1%

Affordability Ratio 2.5x

Bachelor's Degree+ 27.5%

High School Graduation 93.8%

Cities/Places 21

Population 64,754 23rd of 102

Median Income $66,220 21% lower than state

Poverty Rate 12.8%

Unemployment 3.9%

How Adams County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	65,166	64,754	-0.6%
Median household income	$64,962	$66,220	+1.9%
Median home value	$155,900	$162,600	+4.3%

Median Household Income

Adams

$66,220

$83,390

National

$80,734

Median Home Value

Adams

$162,600

$263,300

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 18.0%

$25K-$50K 20.1%

$50K-$100K 31.8%

$100K+ 30.1%

Detailed income brackets

Under $10K

5.8%

$10K-$15K

4.0%

$15K-$20K

3.7%

$20K-$25K

4.4%

$25K-$30K

3.8%

$30K-$35K

5.1%

$35K-$40K

2.9%

$40K-$45K

5.0%

$45K-$50K

3.3%

$50K-$60K

7.9%

$60K-$75K

9.8%

$75K-$100K

14.0%

$100K-$125K

10.3%

$125K-$150K

6.8%

$150K-$200K

7.6%

$200K+

5.5%

Employment

3.9% Unemployment Rate State: 5.8%|National: 5.2%

65.2% Labor Force Participation

Housing Overview

Owner 72.1%

Renter 27.9%

Affordability Index Very Affordable

2.5x home value to income ratio

Median gross rent $828/mo 15.0% of median household income annually

People & Demographics

Age Distribution

Under 18

22.5%

18-34

19.9%

35-54

23.3%

55-74

25.2%

75+

9.1%

Race & Ethnicity

Diversity Index

Very Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 61 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Adams County

City	Population	Median Income	Poverty	Home Value
Quincy	39,109	$56,480	16.7%	$153,200
Camp Point	1,230	$62,188	14.9%	$127,800
Mendon	1,167	$65,781	15.7%	$111,600
Payson	1,100	$60,478	12.4%	$132,000
Ursa	726	$64,375	10.7%	$161,900
Golden	693	$55,000	6.4%	$122,800
Clayton	602	$66,136	12.7%	$91,500
Liberty	409	$78,977	6.4%	$137,500
Loraine	341	$58,750	8.8%	$83,600
Lima	224	$74,375	4.9%	$88,800
Coatsburg	209	$63,750	6.2%	$81,700
Plainville	183	$76,250	8.7%	$98,000
Paloma	161	N/A	0.0%	N/A
Burton	149	$108,125	0.0%	$138,500
Kingston	132	N/A	82.6%	N/A
Adams	106	N/A	0.0%	N/A
Columbus	106	$75,000	10.4%	$111,400
La Prairie	48	$83,333	4.2%	$105,600
Marcelline	33	N/A	0.0%	N/A
Fowler	32	N/A	0.0%	N/A
Meyer	22	N/A	0.0%	N/A

Explore Illinois Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Adams County is located in Illinois with a total population of 64,754. It is the 23rd most populous county out of 102 in Illinois. The county encompasses 21 Census-designated places.

Age Demographics

The median age in Adams County is 41.4 years. This is 6% higher than the state median of 39.0 years.

Economy, Income & Housing

The median household income in Adams County is $66,220. This is 21% lower than the state median of $83,390. It is also 18% lower than the national median of $80,734. The poverty rate stands at 12.8%. This is 9% higher than the state poverty rate of 11.8%. The unemployment rate is 3.9%. This is 34% lower than the state rate of 5.8%. The median home value is $162,600. Housing costs are 38% lower than the state median of $263,300. With a home-value-to-income ratio of just 2.5x, Adams County is one of the most affordable housing markets in the area. 72.1% of occupied housing units are owner-occupied. This homeownership rate is 8% higher than the state average of 67.1%.

Race & Ethnicity

Adams County has a predominantly White (non-Hispanic) population, comprising 90.0% of all residents. Black or African American residents account for 2.8%. The White (non-Hispanic) population is significantly higher than the state average (90.0% vs 58.1%). The Black or African American population (2.8%) is well below the state average of 13.3%. The Hispanic or Latino population (2.1%) is well below the state average of 18.8%. The Asian population (0.7%) is well below the state average of 5.9%.

Education

27.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 27% lower than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.8%.

Data Sources & Methodology

All figures for Adams County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Illinois and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Adams County, Illinois?

Adams County has a population of 64,754, making it the 23rd most populous county in Illinois.

What is the median income in Adams County?

The median household income in Adams County is $66,220 with a poverty rate of 12.8%.

How many cities are in Adams County, Illinois?

Adams County contains 21 Census-designated places.