Horseshoe Lake State Park
12 mi NW · State Park
State parks near O'Fallon, IL
16 state parks within 50 miles of O'Fallon, closest first. Distances are straight-line from the town center.
Closest with a photo
Scott Joplin House State Historic Site
17 mi W · State Historic Site
Jones-Confluence Point State Park
19 mi NW · State Park
All 16 state parks
Horseshoe Lake State ParkState Park · Madison County, IL12 miNW
Scott Joplin House State Historic SiteState Historic Site · St. Louis city, MO17 miW
Jones-Confluence Point State ParkState Park · St. Charles County, MO19 miNW
Mastodon State Historic SiteState Historic Site · Jefferson County, MO30 miSW
Katy Trail State ParkState Park · St. Charles County, MO31 miNW- South Shore State ParkState Park · Clinton County, IL33 miE
First Missouri State Capitol State Historic SiteState Historic Site · St. Charles County, MO33 miNW
Castlewood State ParkState Park · St. Louis County, MO34 miW
Washington County State Recreation AreaState Recreation Area · Washington County, IL37 miSE
Route 66 State ParkState Park · St. Louis County, MO37 miW
Babler State ParkState Park · St. Louis County, MO42 miW
Beaver Dam State ParkState Park · Macoupin County, IL43 miN
Felix Vallé House State Historic SiteState Historic Site · Ste. Genevieve County, MO43 miS
Fort Kaskaskia State Historic SiteState Historic Site · Randolph County, IL43 miS- Pere Marquette State ParkState Park · Jersey County, IL43 miNW
Don Robinson State ParkState Park · Jefferson County, MO45 miW
Parks from Wikidata; town location from GeoNames. Checked September 25, 2026.