Cottage Grove is a city 10 miles (16 km) south of Saint Paul in Washington County in the State of Minnesota. It lies on the north bank of the Mississippi River, north of the confluence with the St. Croix River. Cottage Grove and nearby suburbs form the southeast portion of Minneapolis-Saint Paul, the 16th-largest metropolitan area in the United States, with about 3.52 million residents. Its population was 34,589 at the 2010 census.
The city is linked by U.S. Highways 10 and 61 and has a comfortable commute to both downtowns and the I-494 Strip in Bloomington. Once a rural township known for the state's first creameries and wheat production, the area was served by rail lines, river shipping, and grist mills. 3M has operated a production facility in Cottage Grove since 1947.
Cottage Grove was platted in 1871. The Precolumbian Schilling Archeological District, 1850 Grey Cloud Lime Kiln, 1871 John P. Furber House, and 1917 Cordenio Severance House are listed on the National Register of Historic Places.
Cottage Grove is five miles southeast of St. Paul.