Belle Plaine is a city in Scott County, Minnesota, United States, about 40 minutes southwest of Minneapolis. The population was 7,395 at the 2020 census. Minnesota Territorial Supreme Court Judge Andrew G. Chatfield selected the townsite of Belle Plaine in 1853 while traveling from Mendota to Traverse des Sioux to hold court, as it was a halfway marker on his usual path of travel. Chatfield chose to name the townsite Belle Plaine, which is French for "Beautiful Prairie."