Jefferson County, Washington

Jefferson County is located on Washington’s Olympic Peninsula, where rugged mountains meet the waters of the Pacific Northwest. Port Townsend, the county seat, is known for its historic charm, creative community, and relaxed atmosphere.

Further inland, the landscape becomes increasingly wild, with a large portion of Olympic National Park lying within the county. The area is a favorite for hikers, campers, and anyone looking to explore the outdoors. Tourism and timber remain important parts of the local economy.

Named after Thomas Jefferson, the county has a history that reaches back thousands of years, long before European settlement, when Native peoples lived throughout the region. Today, Jefferson County retains a peaceful, laid-back character, where scenic trails, dense forests, and wildlife—including bald eagles—are part of everyday life.

CategoryDetails
County NameJefferson County
County SeatPort Townsend
PopulationApproximately 34,000
Cities, Towns, and CommunitiesPort Townsend, Port Hadlock, Quilcene, Chimacum, Brinnon
Interstates and HighwaysUS-101, WA-19, WA-20
FIPS Code53-031
Total Area (Land and Water)2,183 sq mi (Land: 1,804 sq mi; Water: 379 sq mi)
Adjacent Counties (and Direction) Island County (Northeast), Kitsap County (Southeast), Mason County (South), Grays Harbor County (Southwest), Clallam County (Northwest), San Juan County (Northeast)
Time ZonePacific Time Zone (PT)
StateWashington
Coordinates47.7914° N, 123.0460° W
EtymologyNamed after Thomas Jefferson, the 3rd President of the United States
Major LandmarksOlympic National Park, Fort Worden State Park, Dosewallips State Park
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