San Juan County, Washington
San Juan County, Washington, has 18,577 residents (July 2025 estimate). Its county seat is Friday Harbor. It uses Pacific Time and covers 174 sq mi (450 km²) of land.
- Resident population, July 2025
- 18,577
- Land area
- 174 sq mi (450 km²)
- County seat or government
- Friday Harbor
- Time zone
- Pacific TimeUTC-08:00 in January; UTC-07:00 in July
- Median household income
- $84,800 ± $5,910
- Median home value
- $799,200 ± $22,896
- Median rent, with utilities
- $1,512 ± $112
- Homes lived in by their owners
- 78% ± 0.7 points
- County type
- County
- Metro or micro area
- Outside any metro or micro areaNext to: Oak Harbor, WA micro area, Port Townsend, WA micro area, Port Angeles, WA micro area, Bellingham, WA metro area, and Mount Vernon-Anacortes, WA metro area
- Water area
- 447 sq mi (1,157 km²)
- State
- Washington
- County code (FIPS)
- 53055
- Coordinates (central point)
- 48.507190, -123.103769
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in San Juan County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Pacific TimeAmerica/Los_Angeles | UTC-08:00 in January; UTC-07:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 9822123,562 people
- 982509,254 people
- 982454,265 people
- 982612,984 people
- 98279680 people
- 98280442 people
- 98243327 people
- 98286155 people
- 98222121 people
- 9829747 people
10 ZIP Code areas overlap San Juan County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
San Juan 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.
School districts in San Juan County, largest first
- San Juan Island School District9,254 people
- Orcas Island School District5,882 people
- Lopez School District3,187 people
- Shaw Island School District155 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Tribal areas in San Juan County, largest first
- Samish Tribal Designated Statistical Area42,442 people
American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Friday Harbor, Washington (town)2,728 people
- Roche Harbor, Washington (CDP)778 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Island County, Washington31 mi southeast
- Clallam County, Washington45 mi southwest
- Jefferson County, Washington52 mi south
- Skagit County, Washington59 mi east
- Whatcom County, Washington62 mi east
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.