Anderson Lake State Fish & Wildlife Area

Established: 1947 Island: Fulton Area: 2,247 acres Illinois State Parks Official Website

Apple River Canyon State Park

Established: 1932 Island: Jo Daviess Area: 297 acres Illinois State Parks Official Website

Argyle Lake State Park

Established: 1948 Island: McDonough Area: 1,700 acres Illinois State Parks Official Website

Banner Marsh State Fish & Wildlife Area

Established: 1980's Island: Fulton, Peoria Area: 4,363 acres Illinois State Parks Official Website

Beall Woods State Park

Established: 1966 Island: Wabash Area: 635 acres Illinois State Parks Official Website

Beaver Dam State Park

Established: 1947 Island: Macoupin Area: 750 acres Illinois State Parks Official Website

Buffalo Rock State Park

Established: 1928 Island: LaSalle Area: 298 acres Illinois State Parks Official Website

Cache River State Natural Area

Established: 1970 Island: Johnson Area: 14,314 acres Illinois State Parks Official Website

Castle Rock State Park

Established: 1921 Island: Ogle Area: 2,000 acres Illinois State Parks Official Website

Cave-In-Rock State Park

Established: 1929 Island: Hardin Area: 204 acres Illinois State Parks Official Website

Chain O'Lakes State Park

Established: 1945 Island: McHenry Area: 1,700 acres Illinois State Parks Official Website

Clinton Lakes State Recreation Area

Established: 1978 Island: DeWitt Area: 9,300 acres Illinois State Parks Official Website

Dixon Springs State Park

Established: 1946 Island: Pope Area: 801 acres Illinois State Parks Official Website

Eldon Hazlet State Recreation Area

Established: 1960 Island: Clinton Area: 3,000 acres Illinois State Parks Official Website

Ferne Clyffe State Park

Established: 1949 Island: Johnson Area: 2,430 acres Illinois State Parks Official Website

Fort Massac State Park

Established: 1908 Island: Massac Area: 1,450 acres Illinois State Parks Official Website

Fox Ridge State Park

Established: 1930's Island: Coles Area: 2,064 acres Illinois State Parks Official Website

Frank Holten State Park

Established: 1964 Island: St. Clair Area: 1,080 acres Illinois State Parks Official Website

Fults Hill Prairie State Natural Area

Established: 1970 Island: Monroe Area: 997 acres Illinois State Parks Official Website

Giant City State Park

Established: 1927 Island: Jackson, Union Area: 1,100 acres Illinois State Parks Official Website

Goose Lake Prairie State Natural Area

Established: 1969 Island: Grundy Area: 2,537 acres Illinois State Parks Official Website

Harry "Babe" Woodyard State Natural Area

Established: 1996 Island: Vermilion Area: 1,104 acres Illinois State Parks Official Website

Hennepin Canal Parkway State Park

Established: 1970 Island: Bureau, Henry, Lee, Rock Island, Whiteside Area: 244 acres Illinois State Parks Official Website

Illinois Beach State Park

Established: 1948 Island: Lake Area: 4,160 acres Illinois State Parks Official Website