Owosso, MI

ZIP code 48867 covers Owosso, a city in Shiawassee County, Michigan, along the Shiawassee River. Notable sites include Curwood Castle, a riverfront home built by author James Oliver Curwood and now a museum; the Shiawassee Arts Center, housed in a former waterworks building; and the Steam Railroading Institute, home of the Pere Marquette 1225 steam locomotive. Owosso’s historic downtown also features civic, commercial, and cultural buildings.