Dodge No. 4 State Park, originally the Dodge Brothers State Park No. 4, is a public recreation area covering on the north shore of Cass Lake in Oakland County, northern Metro Detroit, Michigan. The state park occupies a mile of shoreline on the lake.
The park was created in 1922 when Dodge Brothers Corporation donated the land, stipulating that it be maintained as a public park in perpetuity. It the only remaining Dodge Brothers State Park retaining its name, with the others having been incorporated into other state parks and recreation areas (two are now parts of state game areas) or turned over to municipal authorities as locally-managed parks.
The park offers swimming, fishing for bass, pike, perch and trout, a fishing pier, picnicking facilities, and boat ramp.