Powhatan Historic State Park (formerly Powhatan Courthouse State Park) is a 9.1-acre (3.7 ha) Arkansas state park in Lawrence County, Arkansas in the United States. The park contains the 1888 Powhatan courthouse which served as the home of county government from 1869 to 1968. Today the structure displays items of cultural and historical significance and hosts the park's Visitor Center. The park includes four additional historical buildings and the Arkansas History Commission's Northeast Arkansas Regional Archives. A tour of the historic structures is available. Powhatan served as an important stop for traffic on the Black River until the installation of the Kansas City-Memphis Railwayline two miles north in 1883 significantly decreased the need for river transportation.