Bayport is a city in Washington County, Minnesota, United States. The population was 3,471 at the 2010 census.
Bayport is located on the St. Croix River one mile south of Stillwater, Minnesota. It is the headquarters of the Andersen Corporation, a major manufacturer of windows. It is also home to the Minnesota Correctional Facility - Stillwater.
According to the United States Census Bureau, the city has a total area of 1.8 square miles (4.7 km²), all of it land. Minnesota State Highway 95 serves as a main route in the community.