Grayton Beach State Park, State park in Florida, United States

Grayton Beach State Park is a coastal park in Florida with fine sand, low dunes, and a lake separated from the sea by a narrow strip. The area includes trails, campsites, and cabins among pines and palms.

In 1885 Army major Charles T. Gray became the first settler on the land that became Grayton Beach; in 1890 William Miller and William Wilson laid out the village and named it after Gray. The state leased 356 acres from the Florida Board of Education on 21 September 1964 and opened the Grayton Beach State Recreation Area in 1968. Further land purchases in 1985, 1993 and 1995 enlarged the park.

Grayton Beach was named after Army major Charles T. Gray, who settled the land in 1885. In 1890, William Miller and William Wilson laid out the village streets and blocks. The Butler family became the community's leading promoter after arriving in 1913.

A paved spur road off County Road 30A leads into the main park section, where parking and restrooms sit near the beach. A 1.5 km (about one mile) stretch of fine sand fronts the Gulf. A boat ramp on the east shore of Western Lake serves kayaks and canoes, and 6 km of walking and cycling paths run through the wooded interior.

Western Lake shifts between freshwater and brackish water depending on whether the sand barrier to the Gulf opens or closes. This barrier breaks open naturally several times a year during storms or high water.