How many people live in Adams County, WA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 21,000 people living in Adams County, WA. That makes Adams County the 31st-most populous county in Washington. It is home to 0.26% of people living in the state.
21K
population of Adams County, WA (2024)
0.26%
County share of the Washington population (2024)
About 21,000 people lived in Adams County, WA in 2024.
Population estimates, 2000–2024
What are Adams County, WA’s age demographics?
About 2,600 Adams County, WA residents are aged 65 and older in 2024. That represents 12.3% of its population. For comparison, the age group represents 17.4% of Washington’s population and 18% in the US overall.
Another 7,100 Adams County residents, or 33.8% of the population, were children under 18. For comparison, the age group represents 20.9% of Washington’s population and 21.6% in the US overall.
A higher share of Adams County, WA's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Adams County, WA’s racial and ethnic demographics?
Hispanic residents make up 65.7% of the Adams County, WA population, higher than the national share of 20%.
In contrast, Adams County’s non-Hispanic white population accounts for 31%, below the 57.5% nationwide, and the non-Hispanic Black or African American population makes up 0.87% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Adams County, WA has a higher share of a Hispanic population than Washington as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Adams County, WA is Othello with about 9,000 residents in 2024.
Cities and towns in Adams County, WA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Othello | 9,001 |
| 2. | Ritzville | 1,709 |
| 3. | Lind | 524 |
| 4. | Washtucna | 199 |
| 5. | Hatton | 141 |
| 6. | Balance of Adams County | 9,465 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
