Washington County, Illinois Demographics 2026

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

Washington County, Illinois has a population of 13,627, the 76th most populous county in Illinois. The median household income is $78,224 and the median home value is $155,700. The poverty rate is 7.5%.

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

Washington County Quick Facts

Population 13,627

Median Household Income $78,224

Median Home Value $155,700

Poverty Rate 7.5%

Unemployment Rate 4.3%

Median Age 44.2 years

Homeownership Rate 84.1%

Affordability Ratio 2.0x

Bachelor's Degree+ 23.5%

High School Graduation 92.9%

Cities/Places 12

Population 13,627 76th of 102

Median Income $78,224 6% lower than state

Poverty Rate 7.5%

Unemployment 4.3%

How Washington 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	13,682	13,627	-0.4%
Median household income	$75,652	$78,224	+3.4%
Median home value	$149,800	$155,700	+3.9%

Median Household Income

Washington

$78,224

$83,390

National

$80,734

Median Home Value

Washington

$155,700

$263,300

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 11.3%

$25K-$50K 19.4%

$50K-$100K 33.8%

$100K+ 35.4%

Detailed income brackets

Under $10K

3.0%

$10K-$15K

3.7%

$15K-$20K

1.6%

$20K-$25K

3.0%

$25K-$30K

3.7%

$30K-$35K

2.1%

$35K-$40K

5.4%

$40K-$45K

4.5%

$45K-$50K

3.8%

$50K-$60K

6.8%

$60K-$75K

11.3%

$75K-$100K

15.7%

$100K-$125K

11.7%

$125K-$150K

8.8%

$150K-$200K

9.6%

$200K+

5.4%

Employment

4.3% Unemployment Rate State: 5.8%|National: 5.2%

63.3% Labor Force Participation

Housing Overview

Owner 84.1%

Renter 15.9%

Affordability Index Very Affordable

2.0x home value to income ratio

Median gross rent $818/mo 12.5% of median household income annually

People & Demographics

Age Distribution

Under 18

20.8%

18-34

17.8%

35-54

24.5%

55-74

27.7%

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 Washington County

City	Population	Median Income	Poverty	Home Value
Nashville	2,940	$63,170	6.8%	$156,500
Okawville	1,299	$84,417	3.5%	$160,700
Irvington	774	$80,219	4.7%	$91,700
Hoyleton	523	$71,094	15.1%	$100,000
Ashley	412	$49,559	34.3%	$82,500
Addieville	294	$99,583	7.8%	$156,000
Oakdale	264	$106,364	4.9%	$98,300
New Minden	218	$66,875	8.5%	$95,000
Richview	208	$71,250	7.7%	$90,800
Venedy	161	$86,250	2.5%	$126,300
Radom	146	$55,833	7.5%	$105,400
Du Bois	122	$53,750	9.0%	$75,000

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

Washington County is located in Illinois with a total population of 13,627. It is the 76th most populous county out of 102 in Illinois. The county encompasses 12 Census-designated places.

Age Demographics

The median age in Washington County is 44.2 years. This is 13% higher than the state median of 39.0 years.

Economy, Income & Housing

The median household income in Washington County is $78,224. This is 6% lower than the state median of $83,390. It is also 3% lower than the national median of $80,734. The poverty rate stands at 7.5%. This is 36% lower than the state poverty rate of 11.8%. The unemployment rate is 4.3%. This is 26% lower than the state rate of 5.8%. The median home value is $155,700. Housing costs are 41% lower than the state median of $263,300. With a home-value-to-income ratio of just 2.0x, Washington County is one of the most affordable housing markets in the area. 84.1% of occupied housing units are owner-occupied. This homeownership rate is 25% higher than the state average of 67.1%.

Race & Ethnicity

Washington County has a predominantly White (non-Hispanic) population, comprising 94.8% of all residents. Hispanic or Latino residents account for 1.6%. The White (non-Hispanic) population is significantly higher than the state average (94.8% vs 58.1%). The Black or African American population (1.2%) is well below the state average of 13.3%. The Hispanic or Latino population (1.6%) is well below the state average of 18.8%. The Asian population (0.2%) is well below the state average of 5.9%.

Education

23.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 38% 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 92.9%.

Data Sources & Methodology

All figures for Washington 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 Washington County, Illinois?

Washington County has a population of 13,627, making it the 76th most populous county in Illinois.

What is the median income in Washington County?

The median household income in Washington County is $78,224 with a poverty rate of 7.5%.

How many cities are in Washington County, Illinois?

Washington County contains 12 Census-designated places.