Goose Island State Park, Coastal state park in Aransas County, Texas.

Goose Island State Park is a 321.4-acre (130 ha) state park in Aransas County, Texas, north of Rockport, surrounded by St. Charles and Aransas Bays. The land is flat coastal terrain with marsh grass, mudflats, and oyster-shell shoreline; there is no designated swimming area. The park holds 45 shade shelters with electricity and water on the island, plus 57 shelters with electricity and water and 27 with water only on the mainland.

Goose Island State Park was created on land bought from private owners between 1931 and 1935. Civilian Conservation Corps Company 1801 built the first facilities, including the entrance portal, the concession building that now serves as the recreation hall, picnic units, roads, bridges, shelters, tables, benches and drainage systems.

The park's name comes from the geese that gather along these bays, and birding is one of its main draws. Anglers here catch spotted seatrout, red drum, black drum, southern flounder and sheepshead. The CCC-built concession building now serves as the recreation hall.

The property offers overnight options ranging from basic to fully equipped spots for tents and recreational vehicles. Visitors should prepare for flat terrain and plan visits during operating hours.

The Big Tree, a southern live oak in the park, has been classed as the State Champion Coastal Live Oak since 1969. It stands 44 feet (13 m) tall with a crown spread of 90 feet (27 m), and its trunk measures 35 feet (11 m) around.