Demographics of Washington County, Illinois

Washington County, Illinois had 13,564 people on July 1, 2025, by the Census Bureau’s estimate: −165 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Washington County, in four figures

13,564
Population: July 1, 2025, Vintage 2025 estimate.; −1.2%
Change since July 2020: −165 people.; 44.2 ±0.5
Median age: ACS 2020–⁠2024.; $78,224 ±$6,305
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Washington County, Illinois's population shrank 1.2% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Washington County, Illinois's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Washington County, Illinois's population shrank 1.2% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Washington County, Illinois's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	13,729	100.0	100.0
2021	13,654	99.5	100.2
2022	13,651	99.4	100.7
2023	13,574	98.9	101.6
2024	13,579	98.9	102.5
2025	13,564	98.8	103.1

3 more columns on a wider screen

Population of Washington County, Illinois on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	13,729	−36	0	0	−34
2021	13,654	−75	−48	+1	−40
2022	13,651	−3	−42	+1	+49
2023	13,574	−77	−41	0	−31
2024	13,579	+5	−9	0	+14
2025	13,564	−15	−17	0	0

Age, 2020–2024

The median age is 44.2 ±0.5: for men 43.1 ±0.7 and for women 45.4 ±0.7. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

2 more columns on a wider screen

People in Washington County by age, ACS 2020–2024
Age	People	Share	Illinois	United States
Under 5	711 ±25	5.2% ±0.2	5.4% ±<0.1	5.6% ±<0.1
5 to 17	2,125 ±150	15.6% ±1.1	16.4% ±0.1	16.3% ±<0.1
18 to 24	967 ±111	7.1% ±0.8	9.1% ±<0.1	9.1% ±<0.1
25 to 44	3,119 ±156	22.9% ±1.1	26.9% ±0.1	26.9% ±<0.1
45 to 64	3,757 ±196	27.6% ±1.4	25.2% ±0.1	24.8% ±<0.1
65 and over	2,948 ±203	21.6% ±1.5	17.0% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $78,224 ±$6,305, and income per person $40,841 ±$2,339, in 2024 dollars. The median is $83,390 ±$362 in Illinois and $80,734 ±$166 in the United States.

Households by income

2 more columns on a wider screen

Households in Washington County by income, ACS 2020–2024
Household income	Households	Share	Illinois	United States
Under $25,000	657 ±118	11.3% ±2.0	14.6% ±0.1	14.6% ±<0.1
$25,000 to $49,999	1,125 ±177	19.4% ±3.0	16.0% ±0.2	16.7% ±<0.1
$50,000 to $74,999	1,051 ±160	18.1% ±2.7	14.8% ±0.1	15.5% ±<0.1
$75,000 to $99,999	908 ±143	15.7% ±2.4	12.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	1,184 ±179	20.4% ±3.0	18.0% ±0.2	17.5% ±<0.1
$150,000 to $199,999	558 ±103	9.6% ±1.8	10.1% ±0.1	9.6% ±<0.1
$200,000 or more	312 ±71	5.4% ±1.2	13.8% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

2 more columns on a wider screen

Poverty rate in Washington County by age, ACS 2020–2024
Age	Below poverty	Rate	Illinois	United States
All ages	1,008 ±240	7.5% ±1.8	11.8% ±0.1	12.5% ±0.1
Under 18	233 ±94	8.5% ±3.4	15.1% ±0.2	16.1% ±0.1
18 to 59	458 ±111	7.0% ±1.7	11.0% ±0.1	11.6% ±0.1
60 and over	317 ±86	7.8% ±2.1	10.6% ±0.1	11.0% ±<0.1

Housing, 2020–2024

1 more column on a wider screen

Housing in Washington County, ACS 2020–2024
Measure	Washington County	Illinois	United States
Housing units	6,415 ±49	5,457,452 ±471	143,775,355 ±10,234
Occupied	90.3% ±2.2	92.3% ±0.1	89.9% ±0.1
Vacant	9.7% ±2.1	7.7% ±0.1	10.1% ±0.1
Owner occupied	84.1% ±2.3	67.1% ±0.3	65.2% ±0.3
Renter occupied	15.9% ±2.6	32.9% ±0.2	34.8% ±0.1
Median home value	$155,700 ±$7,507	$263,300 ±$797	$332,700 ±$236
Median gross rent	$818 ±$68	$1,274 ±$5	$1,413 ±$2
Median year built	1972 ±2	1971 ±2	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

2 more columns on a wider screen

People in Washington County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Illinois	United States
Hispanic or Latino	217 ±0	1.6% ±<0.1	18.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	12,919 ±57	94.8% ±0.4	58.1% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	166 ±49	1.2% ±0.4	13.3% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	9 to 49	0.1% to 0.4%	5.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	3 to 21	< 0.1% to 0.2%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 20	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	1 to 21	< 0.1% to 0.2%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	273 ±70	2.0% ±0.5	3.4% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

2 more columns on a wider screen

People in Washington County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Illinois	United States
Born in the state	11,193 ±234	82.1% ±1.7	66.5% ±0.1	57.3% ±<0.1
Born in another state	2,312 ±229	17.0% ±1.7	17.5% ±0.1	26.9% ±<0.1
Born a citizen outside the states	12 to 56	0.1% to 0.4%	1.3% ±<0.1	1.7% ±<0.1
Born abroad	88 ±39	0.6% ±0.3	14.7% ±0.1	14.1% ±<0.1
Naturalized citizens	16 to 78	0.1% to 0.6%	7.7% ±0.1	7.4% ±<0.1
Not citizens	16 to 66	0.1% to 0.5%	7.0% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Washington County among the counties of Illinois

75th of 102 by population, July 2025. Every one is listed on the Illinois page.

Counties of Illinois near Washington County in population, July 2025
County	July 2025	Change since 2020
De Witt County	15,118	−2.1%
Clark County	15,114	−2.2%
Moultrie County	14,371	−0.8%
Pike County	14,231	−2.8%
Lawrence County	13,790	−9.7%
Washington County	13,564	−1.2%
Massac County	13,502	−4.5%
Johnson County	13,363	+0.3%
White County	13,250	−4.0%
Ford County	13,216	−2.2%
Clay County	12,793	−3.6%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026