Stillwater
- County:
- Washington County
- County Seat:
- Yes
- Area (mi²):
- 8.046
- State:
- Minnesota
Stillwater is a city located in Washington County, Minnesota. Stillwater has a 2026 population of 19,386. It is also the county seat of Washington County. Stillwater is currently growing at a rate of 0.58% annually but its population has decreased by -0.09% since the most recent census, which recorded a population of 19,404 in 2020.