Lancaster is a city in Kittson County, Minnesota, in the United States. As of the 2010 census, the city population was 340.
Lancaster was incorporated in 1904 along a Soo Line Railroad line running from Glenwood to the Canadian border. The city was named after a railroad official believed to have come from Lancashire County in England.
According to the United States Census Bureau, the city has a total area of 2.2 square miles (5.8 km²), all of it land.