Washington County's estimated 2026 population is 158,322 with a growth rate of 0.37% in the past year according to the most recent United States census data. Washington County is the 11th largest county in Maryland. The 2010 population was 147,727 and has seen a growth of 7.17% since that time.
Data after 2023 is projected based on recent change
Overall: 40.7 years
Female: 42 years
Male: 39.4 years
There are 121,839 adults, (28,153 of whom are seniors) in Washington County.
Female: 76,620 (49.2%)
Male: 79,089 (50.8%)
The racial composition of Washington County includes 74.94% White, 11.58% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 116,696 | 74.94% |
| Black or African American | 18,030 | 11.58% |
| Two or more races | 14,429 | 9.27% |
| Other race | 3,575 | 2.3% |
| Asian | 2,531 | 1.63% |
| Native American | 331 | 0.21% |
| Native Hawaiian or Pacific Islander | 117 | 0.08% |
Washington County's average per capita income is $53,340. Household income levels show a median of $77,747. The poverty rate stands at 12.42%.
Name | Median | Mean |
|---|---|---|
| Married Families | $112,890 | $132,866 |
| Families | $95,811 | $115,066 |
| Households | $77,747 | $99,335 |
| Non Families | $42,432 | $61,882 |
Average Income
Median Household Income
Poverty Rate