| School Name | Grades | Address | Zip | Phone | County | Type | District Name |
| Academy of the Sacred Heart | PK-8 | 619 N 2nd St
St. Charles, MO | 63301 | (636) 946-6127 | St. Charles | private | |
| Barnwell Middle School | 6-8 | 1035 Jungs Station Rd
St. Charles, MO | 63303 | (636) 851-4100 | St. Charles | public | Francis Howell R-III School District |
| Becky-David Elementary School | K-5 | 1155 Jungs Station Rd
St. Charles, MO | 63303 | (636) 851-4200 | St. Charles | public | Francis Howell R-III School District |
| Bryan Middle School | 6-8 | 605 Independence Rd
St. Charles, MO | 63304 | (636) 851-5800 | St. Charles | public | Francis Howell R-III School District |
| Campbell Montessori School | PK-8 | 3880 Shady Springs Ln
St. Charles, MO | 63301 | (636) 477-8200 | St. Charles | private | |
| Castlio Elementary School | K-5 | 1020 Dingledine Rd
St. Charles, MO | 63304 | (636) 851-4300 | St. Charles | public | Francis Howell R-III School District |
| Central Elementary School | K-5 | 4525 Central School Rd
St. Charles, MO | 63304 | (636) 851-5700 | St. Charles | public | Francis Howell R-III School District |
| Coverdell Elementary School | K-4 | 2475 W Randolph St
St. Charles, MO | 63301 | (636) 443-4600 | St. Charles | public | St. Charles R-VI School District |
| Discovery Elementary School | PK-2 | 500 Discovery Path Lane
St. Charles, MO | 63301 | (636) 757-6800 | St. Charles | public | Orchard Farm R-V School District |
| Duchesne High School | 9-12 | 2550 Elm St
St. Charles, MO | 63301 | (636) 946-6767 | St. Charles | private | |
| Francis Howell Central High School | 9-12 | 5199 Hwy N
St. Charles, MO | 63304 | (636) 851-4600 | St. Charles | public | Francis Howell R-III School District |
| Francis Howell High School | 9-12 | 7001 Hwy 94 South
St. Charles, MO | 63304 | (636) 851-4700 | St. Charles | public | Francis Howell R-III School District |
| Francis Howell Middle School | 6-8 | 825 O'Fallon Rd
St. Charles, MO | 63304 | (636) 851-4800 | St. Charles | public | Francis Howell R-III School District |
| Francis Howell North High School | 9-12 | 2549 Hackmann Rd
St. Charles, MO | 63303 | (636) 851-4900 | St. Charles | public | Francis Howell R-III School District |
| Francis Howell Union High School | 9-12 | 1405 Hwy D
St. Charles, MO | 63304 | (636) 851-5000 | St. Charles | public | Francis Howell R-III School District |
| George M. Null Elementary School | K-4 | 435 Yale Blvd
St. Charles, MO | 63301 | (636) 443-4900 | St. Charles | public | St. Charles R-VI School District |
| Grace Care Christian Academy | PK-12 | 2407 Droste Road
St. Charles, MO | 63301 | (636) 723-4482 | St. Charles | private | |
| Hardin Middle School | 7-8 | 1950 Elm St
St. Charles, MO | 63301 | (636) 443-4300 | St. Charles | public | St. Charles R-VI School District |
| Harris Elementary School | K-4 | 2800 Old Muegge Rd
St. Charles, MO | 63303 | (636) 443-4700 | St. Charles | public | St. Charles R-VI School District |
| Harvest Ridge Elementary School | K-5 | 1220 Harvest Ridge Dr
St. Charles, MO | 63303 | (636) 851-5100 | St. Charles | public | Francis Howell R-III School District |
| Harvester Elementary School | PK-6 | 4075 S Hwy 94
St. Charles, MO | 63304 | (636) 926-0042 | St. Charles | private | |
| Henderson Elementary School | K-5 | 2501 Hackmann Rd
St. Charles, MO | 63303 | (636) 851-5200 | St. Charles | public | Francis Howell R-III School District |
| Heritage Landing | 6-12 | 1400 Gettysburg Landing
St. Charles, MO | 63303 | (636) 851-5300 | St. Charles | public | Francis Howell R-III School District |
| Hollenbeck Middle School | 6-8 | 4555 Central School Rd
St. Charles, MO | 63304 | (636) 851-5400 | St. Charles | public | Francis Howell R-III School District |
| Immanuel Lutheran School | PK-8 | 115 S 6th St
St. Charles, MO | 63301 | (636) 946-0051 | St. Charles | private | |
| Independence Elementary School | K-5 | 4800 Meadows Pkwy
St. Charles, MO | 63304 | (636) 851-5900 | St. Charles | public | Francis Howell R-III School District |
| Jefferson Intermediate School | 5-6 | 2660 Zumbehl Rd
St. Charles, MO | 63301 | (636) 443-4400 | St. Charles | public | St. Charles R-VI School District |
| Lewis & Clark Career Center | 9-12 | 2400 Zumbehl Rd
St. Charles, MO | 63301 | (636) 443-4950 | St. Charles | public | St. Charles R-VI School District |
| Lincoln Elementary School | K-4 | 625 S 6th St
St. Charles, MO | 63301 | (636) 443-4650 | St. Charles | public | St. Charles R-VI School District |
| Monroe Elementary School | K-4 | 2670 Zumbehl Rd
St. Charles, MO | 63301 | (636) 443-4800 | St. Charles | public | St. Charles R-VI School District |
| Orchard Farm Elementary School | K-5 | 2165 Hwy V
St. Charles, MO | 63301 | (636) 250-5200 | St. Charles | public | Orchard Farm R-V School District |
| Orchard Farm Middle School | 6-8 | 2165 Hwy V
St. Charles, MO | 63301 | (636) 250-5300 | St. Charles | public | Orchard Farm R-V School District |
| Orchard Farm Senior High School | 9-12 | 2165 Hwy V
St. Charles, MO | 63301 | (636) 250-5400 | St. Charles | public | Orchard Farm R-V School District |
| Saeger Middle School | 6-8 | 5201 Hwy N
St. Charles, MO | 63304 | (636) 851-5600 | St. Charles | public | Francis Howell R-III School District |
| St. Charles Borromeo School | K-8 | 431 Decatur St
St. Charles, MO | 63301 | (636) 946-2713 | St. Charles | private | |
| St. Charles High School | 9-12 | 725 N Kingshighway St
St. Charles, MO | 63301 | (636) 443-4100 | St. Charles | public | St. Charles R-VI School District |
| St. Charles West High School | 9-12 | 3601 Droste Rd
St. Charles, MO | 63301 | (636) 443-4200 | St. Charles | public | St. Charles R-VI School District |
| St. Cletus School | K-8 | 2721 Zumbehl Rd
St. Charles, MO | 63301 | (636) 946-7756 | St. Charles | private | |
| St. Elizabeth St. Robert Regional | K-8 | 1 Seton Ct
St. Charles, MO | 63303 | (636) 946-6716 | St. Charles | private | |
| St. Joseph School | K-8 | 1351 Motherhead Rd
St. Charles, MO | 63304 | (636) 441-0055 | St. Charles | private | |
| St. Peter Catholic School | K-8 | 201 First Capitol Dr
St. Charles, MO | 63301 | (636) 947-9667 | St. Charles | private | |
| Sts. Joachim & Ann School | K-8 | 4110 McClay Rd
St. Charles, MO | 63304 | (636) 441-4835 | St. Charles | private | |
| Trinity Lutheran School | 1-8 | 4689 N Hwy 94
St. Charles, MO | 63301 | (636) 250-3654 | St. Charles | private | |
| Zion Lutheran School | PK-8 | 3866 Harvester Rd
St. Charles, MO | 63304 | (636) 441-7424 | St. Charles | private | |
