Washington County, Maryland Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 11th-largest in Maryland
The population of Washington County, Maryland is 155,033 as of the 2023 American Community Survey, making it the 11th-largest county in Maryland. The median household income is $74,157, the median home value is $275,900, and the median age is 41.0.
The population of Washington County has grown 6.4% since 2010 (147,727 → 157,228), a +0.45% annualized rate.
155,033
Population
+0.45%
Annual growth
339
People / sq mi
$74,157
Median Income
$275,900
Median Home Value
Washington County covers 458 sq mi of land at 338.7 people per square mile.
About Washington County, MD
Washington County is a county in Maryland with a population of 155,033. It ranks #11 among counties in Maryland by population. The median age is 41.0, older than the national median. The population is 50.8% male and 49.2% female.
The median household income in Washington County is $74,157, near the US median of $74,580. 8.6% of residents live below the federal poverty level. Home values sit at a median of $275,900, with monthly rent averaging $1,100. The homeownership rate of 65.9% is close to the national rate of 64.8%.
Educational attainment in Washington County reflects 23.5% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 11.0% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 29.5 minutes each way.
Washington County Population History (2010-2024)
The county of Washington County had a population of 147,727 in 2010 and 157,228 in 2024, a 6.4% growth over 14 years. The peak was 157,228 in 2024. Average annual growth rate: 0.45%.
157,228
Population (2024)
147,727
Population (2010)
157,228
Peak (2024)
0.45%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 147,727 |
| 2011 | 148,807 |
| 2012 | 149,090 |
| 2013 | 149,055 |
| 2014 | 149,128 |
| 2015 | 149,160 |
| 2016 | 149,715 |
| 2017 | 150,247 |
| 2018 | 150,699 |
| 2019 | 151,066 |
| 2020 | 154,677 |
| 2021 | 155,117 |
| 2022 | 155,407 |
| 2023 | 156,116 |
| 2024 | 157,228 |
Race & Ethnicity
| White | 76.8% |
| Black or African American | 11.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.1% |
| Two or More Races | 0.0% |
Age & Sex
41.0
Median Age
49.2%
Female
50.8%
Male
17.8%
Age 65+
Age Distribution
Children (under 15): 17.9% · Seniors (65+): 17.8%
Income & Poverty
| Median household income | $74,157$-27,495 vs state |
| Mean household income | $95,432 |
| Per-capita income | $37,391 |
| Poverty rate | 8.6%+2.3% vs state |
| Unemployment rate | 2.9% |
| Employment-to-population | 56.8% |
Top Industries by Employment
The largest employment sector in Washington County is professional & business services, accounting for 22.0% of workers.
How residents commute
1.0%
Drive alone
1.2%
Carpool
75.3%
Public transit
11.0%
Work from home
29.5 min
Avg commute
Housing
$275,900$-121,800 vs state
Median home value
$1,100
Median rent
65.9%
Homeownership rate
63,965
Total housing units
92.9%
Occupied
7.1%
Vacant
34.1%
Renter-occupied
Social & access
93.9%
With health insurance
93.5%
With broadband internet
29.1%
Foreign-born
7.3%
Veterans (18+)
15.3%
With a disability
90.6%
Speak language other than English at home
Education
88.7%
High School+
23.5%
Bachelor's+
Largest cities in Maryland
Other counties in Maryland
Part of Maryland
Metro areas in Maryland
County rankings
Frequently Asked Questions
Washington County, Maryland has a population of 155,033 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 11th-largest county in Maryland. Population density is 339 people per square mile.
The population of Washington County has grown 6.4% since 2010 (147,727 → 157,228), a +0.45% annualized rate.
The median household income in Washington County, Maryland is $74,157, with mean (average) household income of $95,432 and per-capita income of $37,391. 8.6% of residents live below the federal poverty level.
In Washington County, the largest racial and ethnic groups are White (76.8%), Black or African American (11.5%), Hispanic or Latino (1.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Washington County, Maryland is 41.0 years. Residents are 49.2% female and 50.8% male.
The median home value in Washington County is $275,900 and median monthly rent is $1,100. 65.9% of occupied housing units are owner-occupied. The county has 63,965 total housing units, 7.1% of which are vacant.
The largest employment sector in Washington County, Maryland is professional, scientific, and management services, employing 22.0% of workers. The unemployment rate is 2.9%.
Baltimore is among the largest cities associated with Washington County, Maryland, with a population of 577,193.
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Full rankings of Maryland counties
Statewide data for Maryland
Population, race, income, age, and trends across Maryland
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.