| School Name | Grades | Address | Zip | Phone | County | Type | District Name |
| Assumption School | K-8 | 203 W 3rd St
O'Fallon, MO | 63366 | (636) 240-4474 | St. Charles | private | |
| Christian High School | 7-12 | 1145 Tom Ginnever Ave.
O'Fallon, MO | 63366 | (636) 978-1680 | St. Charles | private | |
| Crossroads Elementary School | K-5 | 7500 Hwy N
O'Fallon, MO | 63368 | (636) 625-4537 | St. Charles | public | Wentzville R-IV School District |
| Dardenne Elementary School | K-5 | 2621 Hwy K
O'Fallon, MO | 63368 | (636) 978-4001 | St. Charles | public | Fort Zumwalt R-II School District |
| Discovery Ridge Elementary School | K-5 | 2523 Sommers Rd
O'Fallon, MO | 63367 | (636) 561-2354 | St. Charles | public | Wentzville R-IV School District |
| Emge Elementary School | K-5 | 250 Fallon Pkwy
O'Fallon, MO | 63368 | (636) 281-0261 | St. Charles | public | Fort Zumwalt R-II School District |
| First Baptist Christian Academy | PK-6 | 8750 Veterans Memorial Pkwy
O'Fallon, MO | 63366 | (636) 272-3220 | St. Charles | private | |
| Forest Park Elementary School | 3-5 | 501 Sunflower
O'Fallon, MO | 63366 | (636) 272-2704 | St. Charles | public | Fort Zumwalt R-II School District |
| Fort Zumwalt Hope High School | 9-12 | 307 W Pitman
O'Fallon, MO | 63366 | (636) 379-5300 | St. Charles | public | Fort Zumwalt R-II School District |
| Fort Zumwalt North High School | 9-12 | 1230 Tom Ginnever Blvd
O'Fallon, MO | 63366 | (636) 272-4447 | St. Charles | public | Fort Zumwalt R-II School District |
| Fort Zumwalt North Middle School | 6-8 | 210 Virgil St
O'Fallon, MO | 63366 | (636) 281-2356 | St. Charles | public | Fort Zumwalt R-II School District |
| Fort Zumwalt West High School | 9-12 | 1251 Turtle Creek Dr
O'Fallon, MO | 63366 | (636) 379-0300 | St. Charles | public | Fort Zumwalt R-II School District |
| Fort Zuwmalt West Middle School | 6-8 | 150 Waterford Crossing
O'Fallon, MO | 63368 | (636) 272-6690 | St. Charles | public | Fort Zumwalt R-II School District |
| Frontier Middle School | 6-8 | 9233 Hwy Dd
O'Fallon, MO | 63368 | (636) 625-1026 | St. Charles | public | Wentzville R-IV School District |
| Joseph L. Mudd Elementary School | K-2 | 610 Prince Ruppert
O'Fallon, MO | 63366 | (636) 272-2709 | St. Charles | public | Fort Zumwalt R-II School District |
| Kids Academy | K | 7767 Highway N
O'Fallon, MO | 63366 | (636) 561-8697 | St. Charles | private | |
| Lakeview Elementary School | K-5 | 2501 Mexico Rd
O'Fallon, MO | 63366 | (636) 332-2923 | St. Charles | public | Wentzville R-IV School District |
| Mount Hope Elementary School | K-5 | 1099 Mt Hope Ln
O'Fallon, MO | 63366 | (636) 272-2717 | St. Charles | public | Fort Zumwalt R-II School District |
| Ostmann Elementary School | K-5 | 200 Meriwether Lewis Dr
O'Fallon, MO | 63368 | (636) 281-3382 | St. Charles | public | Fort Zumwalt R-II School District |
| Pheasant Point Elementary School | K-5 | 3450 Pheasant Meadow Dr
O'Fallon, MO | 63368 | (636) 379-0173 | St. Charles | public | Fort Zumwalt R-II School District |
| Prairie View Elementary School | K-5 | 1550 Feise Rd
O'Fallon, MO | 63368 | (636) 625-2494 | St. Charles | public | Wentzville R-IV School District |
| Rock Creek Elementary School | K-5 | 8970 Mexico Rd
O'Fallon, MO | 63366 | (636) 978-1611 | St. Charles | public | Fort Zumwalt R-II School District |
| St. Dominic High School | 9-12 | 31 Saint Dominic Dr
O'Fallon, MO | 63366 | (636) 272-6277 | St. Charles | private | |
| Twin Chimneys Elementary School | K-5 | 7396 Twin Chimneys Blvd
O'Fallon, MO | 63368 | (636) 240-0093 | St. Charles | public | Fort Zumwalt R-II School District |
| Westhoff Elementary School | K-5 | 900 Homefield Blvd
O'Fallon, MO | 63366 | (636) 272-6710 | St. Charles | public | Fort Zumwalt R-II School District |
| Wonder Years | PK-5 | 7104 Twin Chimneys Blvd
O'Fallon, MO | 63368 | (636) 978-3240 | St. Charles | private | |
