The East Twin River is a 41.1-mile-long (66.1 km)river in east-central Wisconsin that is a tributary to Lake Michigan. It merges with the West Twin River in the city of Two Rivers at its mouth with the lake. The source of the river is located in central Kewaunee County. On its course it passes through the villages of Mishicot and Tisch Mills. Its tributaries include Jambo Creek and Tisch Mills Creek.