Washington County, Minnesota

Washington County
Location within the U.S. state of Minnesota
Minnesota's location within the U.S.
Coordinates: 45°02′N 92°53′W / 45.04°N 92.89°W / 45.04; -92.89
Country United States
State Minnesota
FoundedOctober 27, 1849
Named afterGeorge Washington
SeatStillwater
Largest cityWoodbury
Area
  Total
423 sq mi (1,100 km2)
  Land384 sq mi (990 km2)
  Water38 sq mi (100 km2)  9.1%
Population
 (2020)
  Total
267,568
  Estimate 
(2024)
283,960
  Density630/sq mi (240/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional districts2nd, 4th, 8th
Websitewww.co.washington.mn.us

Washington County is a county in the U.S. state of Minnesota. As of the 2020 census, the population was 267,568, making it the fifth-most populous county in Minnesota. Its county seat is Stillwater. The largest city in the county is Woodbury, the seventh-largest city in Minnesota and the third-largest Twin Cities suburb. Washington County is included in the Minneapolis-St. Paul-Bloomington, MN-WI Metropolitan Statistical Area.