Washington County, Minnesota

Washington County, Minnesota
Location within the U.S. state of Minnesota
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 (98 km2)  9.1%
Population
 (2020)
 • Total
267,568
 • Estimate 
(2024)
283,960
 • Density697/sq mi (269/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional districts2nd, 4th, 8th
Websitewww.washingtoncountymn.gov

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.