Munster is a suburban town in North Township, Lake County, Indiana, United States. It is in the Chicago metropolitan area, approximately 30 miles (48 km) southeast of the Chicago Loop, and shares municipal boundaries with Hammond to the north, Highland to the east, Dyer and Schererville to the south, and Lansing and Lynwood directly west of the Illinois border. Its population was 23,894 at the 2020 US Census.

Lake County is a county located in the U.S. state of Indiana. In 2020, its population was 498,700, making it Indiana's second-most populous county. The county seat is Crown Point. The county is part of Northwest Indiana and the Chicago metropolitan area, and contains a mix of urban, suburban and rural areas. It is bordered on the north by Lake Michigan and contains a portion of the Indiana Dunes. It includes Marktown, Clayton Mark's planned worker community in East Chicago.