Mason County, Washington
Mason County is a county in Washington. Its county FIPS code is 53045. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 53045
- Representative coordinates
- 47.350832, -123.173103
- County type
- County
- County seat or government
- Shelton
- Resident population, July 2025
- 71,165
- Land area
- 2,485.261 km²
- Water area
- 236.927 km²
- State
- Washington
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Mason County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/Los_Angeles | UTC-08:00 in January; UTC-07:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
98312 · 98380 · 98502 · 98524 · 98528 · 98541 · 98546 · 98548 · 98555 · 98557 · 98560 · 98563 · 98584 · 98588 · 98592
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Mason County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
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Find the county at your current point, check its ZIP area, or find its physical time zone.