The area of Illinois Beach State Park is 16.835 square kilometers.
McCarthy Beach State Park was created in 1945.
Crescent Beach State Park was created in 1966.
Hammonasset Beach State Park was created in 1920.
Peacock Beach State Park was created in 2010.
Headlands Beach State Park was created in 1953.
Carolina Beach State Park was created in 1969.
Myrtle Beach State Park was created in 1935.
Orchard Beach State Park was created in 1921.
Beaver Dam State Park - Illinois - was created in 1947.
Big Foot Beach State Park was created in 1949.
Henderson Beach State Park was created on 1991-03-29.