Delabar State Park is an Illinois state park on 89 acres (36 ha) in Henderson County, Illinois, United States. The park officially opened in 1960 and was named after the two brothers, Roy and Jack Delabar, who donated the site of the park in 1959.
Fox Ridge State Park is an Illinois state park on 2,064 acres (835 ha) in Coles County, Illinois, United States. The State of Illinois took over ownership of the park sometime in the 1930s.
Franklin Creek State Natural Area is an Illinois state park on 882 acres (357 ha) in Lee County, Illinois, United States. Franklin Creek State Natural Area was dedicated in 1982, making it the 24th nature preserve in Illinois.
Giant City State Park is an Illinois state park on 4,000 acres (1,619 ha) in Jackson and Union Counties, Illinois, United States. Illinois acquired more than 1,100 acres (450 ha) in 1927, and dedicated the park as Giant City State Park. A lodge and visitor center welcome state park guests.
Horseshoe Lake State Park is an Illinois state park in Madison County, Illinois, United States. It is approximately 2,960 acres (1,198 ha) and surrounds a large horseshoe-shaped lake called Horseshoe Lake. Horseshoe Lake is the second largest natural lake in Illinois taking up approximately 2,400 acres (971 ha) of the 2,960-acre (1,198 ha) park. The park has connections to Madison County Transit's Schoolhouse Trail, which connects to over 85 miles (137 km) of bike trail in Madison County, and even a trail which goes all of the way to downtown St. Louis after crossing the Mississippi River on the Chain of Rocks Bridge. The park is located in southeastern Granite City, Illinois, 10-mile (16 km) northeast of downtown St. Louis.
Lake Murphysboro State Park is an Illinois state park on 1,022 acres (414 ha) in Jackson County, Illinois, United States.
Clinton Lake State Recreation Area is an Illinois state park on 9,300 acres (3,764 ha) in DeWitt County, Illinois, United States.
Eagle Creek State Park is an Illinois state park on 11,100 acres (4,492 ha) on Lake Shelbyville in Shelby County, Illinois, United States.
Eldon Hazlet State Recreation Area is an Illinois state park on 3,000 acres (1,214 ha) in Clinton County, Illinois, United States.
Golconda Marina State Recreation Area is an Illinois state park on 274 acres (111 ha) in Pope County, Illinois, United States.
Crawford County State Fish and Wildlife Area is an Illinois state park on 1,129 acres (457 ha) in Crawford County, Illinois, United States.
Hamilton County State Fish and Wildlife Area is an Illinois state park on 1,683 acres (681 ha) in Hamilton County, Illinois, United States.
Horseshoe Lake State Fish and Wildlife Area is an Illinois state park on 10,200 acres (4,128 ha) in Alexander County, Illinois, United States. Also see: Horseshoe Lake
Kaskaskia River State Fish and Wildlife Area is an Illinois state park on 20,000 acres (8,094 ha) in St. Clair, Monroe, and Randolph Counties, Illinois, United States. A focus of this conservation area is Baldwin Lake, a perched cooling pond managed by the Illinois Department of Natural Resources for fishing.
Kinkaid Lake State Fish and Wildlife Area is an Illinois state park on 11,750 acres (4,755 ha) in Jackson County, Illinois, United States.
Marshall State Fish and Wildlife Area is an Illinois state park on 6,000 acres (2,400 ha) in Marshall County, Illinois, United States.
Mautino State Fish and Wildlife Area is an Illinois state park on 911 acres (369 ha) in Bureau County, Illinois, United States.
Newton Lake State Fish and Wildlife Area is an Illinois state park on 1,775 acres (718 ha) in Jasper County, Illinois, United States. The park's grasslands are home to the largest of the three remaining greater prairie chicken flocks in Illinois.
Spring Lake State Fish and Wildlife Area is an Illinois state park on 2,032 acres (822 ha) in Tazewell County, Illinois, United States.
Cache River State Natural Area is an Illinois state park centered on the Cache River (Illinois) of 14,314 acres (5,793 ha) in Johnson County, Illinois, United States.
