| Becky-David Elem. | K - 5 | 950 | 14.1 | Saint Charles, 63303 |
| Benton Elem. | K - 5 | 226 | 9.7 | Saint Charles, 63301 |
| Blackhurst Elem. | K - 5 | 319 | 13.8 | Saint Charles, 63301 |
| Castlio Elem. | K - 5 | 939 | 14.6 | Saint Charles, 63304 |
| Central Elem. | K - 5 | 870 | 13.3 | Saint Charles, 63304 |
| Coverdell Elem. | K - 5 | 321 | 13.3 | Saint Charles, 63301 |
| Early Child. Family Educ. Ctr. | PK | 795 | 87.4 | Saint Charles, 63304 |
| Early Child. Family Educ. Ctr. | PK | 599 | 55.5 | Saint Charles, 63303 |
| Early Child. Family Educ. Ctr. | PK | 861 | 42.2 | Saint Charles, 63304 |
| George M. Null Elem. | K - 5 | 267 | 13.6 | Saint Charles, 63301 |
| Harris Elem. | K - 5 | 550 | 14.7 | Saint Charles, 63303 |
| Harvest Ridge Elem. | K - 5 | 684 | 13.8 | Saint Charles, 63303 |
| Henderson Elem. | K - 5 | 586 | 13.9 | Saint Charles, 63303 |
| Independence Elem. | K - 5 | 885 | 15.8 | Saint Charles, 63304 |
| Lincoln Elem. | K - 5 | 243 | 14.1 | Saint Charles, 63301 |
| Monroe Elem. | K - 5 | 439 | 13.2 | Saint Charles, 63301 |
| Orchard Farm Elem. | K - 5 | 581 | 12.6 | Saint Charles, 63301 |
| Barnwell Middle | 6 - 8 | 858 | 15.3 | Saint Charles, 63303 |
| Bryan Middle | 6 - 8 | 1,007 | 16.0 | Saint Charles, 63304 |
| Francis Howell Middle | 6 - 8 | 842 | 16.0 | Saint Charles, 63304 |
| Hardin Middle | 6 - 8 | 650 | 12.2 | Saint Charles, 63301 |
| Hollenbeck Middle | 6 - 8 | 772 | 15.3 | Saint Charles, 63304 |
| Jefferson Middle | 6 - 8 | 684 | 15.4 | Saint Charles, 63301 |
| Orchard Farm Middle | 6 - 8 | 314 | 13.5 | Saint Charles, 63301 |
| Saeger Middle | 6 - 8 | 806 | 14.3 | Saint Charles, 63304 |
| Francis Howell Central High | 9 - 12 | 2,196 | 18.1 | Saint Charles, 63304 |
| Francis Howell High | 9 - 12 | 1,812 | 18.7 | Saint Charles, 63304 |
| Francis Howell North High | 9 - 12 | 2,080 | 17.5 | Saint Charles, 63303 |
| Francis Howell Union High | 9 - 12 | | | Saint Charles, 63304 |
| Lewis & Clark Career Ctr. | 9 - 12 | | | Saint Charles, 63301 |
| Orchard Farm Sr. High | 9 - 12 | 399 | 15.8 | Saint Charles, 63301 |
| St. Charles High | 9 - 12 | 1,015 | 15.1 | Saint Charles, 63301 |
| St. Charles West High | 9 - 12 | 1,019 | 17.5 | Saint Charles, 63301 |
| Heritage Landing | 6 - 12 | | | Saint Charles, 63303 |
| Quest Day Treatment | 6 - 12 | 4 | 0.4 | Saint Charles, 63301 |
