First Missouri State Capitol State Historic Site
12 mi E · State Historic Site
State parks near O'Fallon, MO
16 state parks within 50 miles of O'Fallon, closest first. Distances are straight-line from the town center.
Closest with a photo
All 16 state parks
First Missouri State Capitol State Historic SiteState Historic Site · St. Charles County, MO12 miE
Babler State ParkState Park · St. Louis County, MO13 miS- Pere Marquette State ParkState Park · Jersey County, IL16 miNE
Castlewood State ParkState Park · St. Louis County, MO20 miSE
Cuivre River State ParkState Park · Lincoln County, MO20 miNW
Katy Trail State ParkState Park · St. Charles County, MO21 miE
Route 66 State ParkState Park · St. Louis County, MO22 miS
Robertsville State ParkState Park · Franklin County, MO27 miS
Scott Joplin House State Historic SiteState Historic Site · St. Louis city, MO29 miSE
Don Robinson State ParkState Park · Jefferson County, MO29 miS
Jones-Confluence Point State ParkState Park · St. Charles County, MO31 miE
Horseshoe Lake State ParkState Park · Madison County, IL34 miE
Mastodon State Historic SiteState Historic Site · Jefferson County, MO34 miSE
Meramec State ParkState Park · Franklin County, MO47 miSW
Graham Cave State ParkState Park · Montgomery County, MO48 miW
Beaver Dam State ParkState Park · Macoupin County, IL48 miNE
Parks from Wikidata; town location from GeoNames. Checked September 25, 2026.