Adams County's 2026 population is estimated at 21,403, reflecting a 0.86% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Adams County is the 31st largest county in Washington. The 2010 population was 18,791 and has grown 13.9% since 2010.
Data after 2023 is projected based on recent change
Overall: 29.3 years
Female: 29.7 years
Male: 28.9 years
There are 13,577 adults, (2,529 of whom are seniors) in Adams County.
Female: 10,207 (49.1%)
Male: 10,593 (50.9%)
The racial composition of Adams County includes 42.94% White, 30.71% other race, and smaller percentages for Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 8,932 | 42.94% |
| Other race | 6,387 | 30.71% |
| Two or more races | 4,810 | 23.13% |
| Native American | 483 | 2.32% |
| Asian | 119 | 0.57% |
| Black or African American | 40 | 0.19% |
| Native Hawaiian or Pacific Islander | 29 | 0.14% |
Adams County 's average per capita income is $36,970. Household income levels show a median of $66,136. The poverty rate stands at 19.55%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $86,266 | - |
| Families | $73,287 | $92,225 |
| Households | $66,136 | $92,806 |
| Non Families | $36,538 | $85,442 |
Average Income
Median Household Income
Poverty Rate