Roy Lake State Park is a South Dakota state park in Marshall County, South Dakota in the United States.

The park is divided in two sections on Roy Lake, and is open for year-round recreation including camping, beaches, swimming, fishing, hiking and boating.

[1] The Roy Lake Resort & Lodge is located in the park.

[3] The name of Roy Lake recalls an incident when a dog named Roy drowned at the lake.

This South Dakota state location article is a stub.