Cassopolis, Michigan

Cassopolis is a village in the U.S. state of Michigan. The population was 1,774 at the 2010 census. It is the county seat of Cass County. The village and county are named after statesman Lewis Cass, a New Hampshire native and a prominent U.S. senator from Michigan prior to the American Civil War. Diamond Lake, one of the 100 largest inland lakes in Michigan, is located in Cassopolis.