Killingly Pond State Park is a public recreation area in Killingly, Connecticut, on the western side of Killingly Pond, a 122-acre reservoir that crosses the Connecticut–Rhode Island state line. The park itself covers 162 acres and is organized around outdoor use of both the water and the surrounding land. Visitors use the pond for boating and fishing, while the shore supports hiking and hunting. Its location on a pond shared by two states gives the park a dual role as both a state park and a waterside access point to a broader cross-border landscape.