How many people live in Mason County, WA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 69,600 people living in Mason County, WA. That makes Mason County the 20th-most populous county in Washington. It is home to 0.87% of people living in the state.
69.6K
population of Mason County, WA (2024)
0.87%
County share of the Washington population (2024)
About 69,600 people lived in Mason County, WA in 2024.
Population estimates, 2000–2024
What are Mason County, WA’s age demographics?
About 17,500 Mason County, WA residents are aged 65 and older in 2024. That represents 25.2% of its population. For comparison, the age group represents 17.4% of Washington’s population and 18% in the US overall.
Another 13,500 Mason County residents, or 19.3% 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 Mason County, WA's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Mason County, WA’s racial and ethnic demographics?
Non-Hispanic white residents make up 75.7% of the Mason County, WA population, higher than the national share of 57.5%. Mason County, WA also has a larger share of people identifying as non-Hispanic two or more races (4%) than the US overall (2.5%).
In contrast, Mason County’s non-Hispanic Black or African American population accounts for 1.4%, below the 12.6% nationwide, and the Hispanic population makes up 14.1% of the county, compared with 20% 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.
Mason County, WA has a higher share of a non-Hispanic white population than Washington as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Mason County, WA is Shelton with about 10,700 residents in 2024.
Cities and towns in Mason County, WA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Shelton | 10,737 |
| 2. | Balance of Mason County | 58,895 |
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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.
