Jefferson County, Washington

county in the state of Washington, United States

Jefferson County is a county in Washington in the United States. The county seat is Port Townsend. 29,872 people lived there at the 2010 census.

Jefferson County
Jefferson County Courthouse in Port Townsend
Jefferson County Courthouse in Port Townsend
Map of Washington highlighting Jefferson County
Location within the U.S. state of Washington
Map of the United States highlighting Washington
Washington's location within the U.S.
Coordinates: 47°50′N 123°35′W / 47.84°N 123.58°W / 47.84; -123.58
Country United States
State Washington
FoundedDecember 22, 1852
Named forThomas Jefferson
SeatPort Townsend
Largest cityPort Townsend
 • Total2,183 sq mi (5,650 km2)
 • Land1,804 sq mi (4,670 km2)
 • Water379 sq mi (980 km2)  17%%
 • Total29,872
 • Estimate 
 • Density17/sq mi (7/km2)
Time zoneUTC−8 (Pacific)
 • Summer (DST)UTC−7 (PDT)
Congressional district6th

The county is named after US President Thomas Jefferson.