Independence Dam State Park is a 591-acre (239 ha) in Defiance County, Ohio in the United States. This Ohio state park lies on the banks of the Maumee River and features ruins of the Miami and Erie Canal. The park was established in 1949 and is open for year-round recreation including, boating, fishing, hiking and picnicking. It is off U.S. Route 24 just east of Defiance, Ohio.