Washington County's estimated 2026 population is 159,452 with a growth rate of 0.7% 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 7.94% since that time.
Data after 2023 is projected based on recent change
The racial composition of Washington County includes 76.79% White, 11.49% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (76.79%)
Black or African American (11.49%)
Two or more races (8%)
Other race (1.83%)
Asian (1.65%)
Native American (0.19%)
Native Hawaiian or Pacific Islander (0.07%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 119,045 | 76.79% |
| Black or African American | 17,807 | 11.49% |
| Two or more races | 12,400 | 8% |
| Other race | 2,838 | 1.83% |
| Asian | 2,551 | 1.65% |
| Native American | 291 | 0.19% |
| Native Hawaiian or Pacific Islander | 101 | 0.07% |
Married
Widowed
Divorced
Separated
Never Married
Washington County's average per capita income is $51,825. Household income levels show a median of $74,157. The poverty rate stands at 12.46%.
Name | Median | Mean |
|---|---|---|
| Married Families | $110,368 | $130,003 |
| Families | $92,568 | $111,716 |
| Households | $74,157 | $95,432 |
| Non Families | $39,760 | $56,173 |
Average Income
Median Household Income
Poverty Rate