| St. Joseph Catholic School | Arlington | Private school | PK–8 | 0 |
| St. Joseph Catholic School | Baytown | Private school | PK–8 | 0 |
| St. Joseph Catholic School | Richardson | Private school | PK–8 | 0 |
| St. Joseph Catholic School | Waxahachie | Private school | PK–8 | 0 |
| St. Joseph Catholic School | Bryan | Private school | PK–12 | 0 |
| St. Joseph Catholic School - Elementary Campus | Bryan | Private school | PK–5 | 0 |
| St. Joseph Elementary School | Yoakum | Private school | PK–8 | 0 |
| St. Joseph High School | Victoria | Private school | 9–12 | 0 |
| St. Louis Catholic School | Austin | Private school | PK–8 | 0 |
| St. Louis Catholic School | Waco | Private school | PK–12 | 0 |
| St. Louis Catholic School | Castroville | Private school | K–5 | 0 |
| St. Luke Catholic School | San Antonio | Private school | PK–8 | 0 |
| St. Lukes Episcopal School | San Antonio | Private school | PK–8 | 0 |
| St. Luke's Preschool | Lubbock | Private school | PK–K | 0 |
| St. Mark Lutheran School | Houston | Private school | PK–8 | 0 |
| St. Mark's Episcopal School | Houston | Private school | PK–8 | 0 |
| St. Marks School | El Paso | Private school | PK–8 | 0 |
| St. Martha Catholic School | Kingwood | Private school | PK–8 | 0 |
| St. Martin De Porres Catholic School | Prosper | Private school | PK–8 | 0 |
| St. Mary Catholic School | League City | Private school | PK–8 | 0 |
| St. Mary Catholic School | Orange | Private school | PK–8 | 0 |
| St. Mary Magdalene School | Humble | Private school | PK–8 | 0 |
| St. Mary Of Carmel School | Dallas | Private school | PK–8 | 0 |
| St. Mary Of The Purification Catholic School | Houston | Private school | K–8 | 0 |
| St. Mary S Catholic School | Longview | Private school | PK–12 | 0 |
| St. Mary School | Gainesville | Private school | PK–8 | 0 |
| St. Marys Cathedral School | Amarillo | Private school | PK–5 | 0 |
| St. Marys Catholic School | Sherman | Private school | PK–8 | 0 |
| St. Mary's Catholic School | Taylor | Private school | K–11 | 0 |
| St. Marys Catholic School | Temple | Private school | PK–8 | 0 |
| St. Mary's Catholic School | Brownsville | Private school | PK–6 | 0 |
| St. Marys Central Catholic School | Odessa | Private school | PK–8 | 0 |
| St. Mary's Elementary School | Fredericksburg | Private school | PK–8 | 0 |
| St. Marys Episcopal Day School | Bellville | Private school | PK–K | 0 |
| St. Mary's Hall | San Antonio | Private school | PK–12 | 0 |
| St. Marys School | West | Private school | PK–8 | 0 |
| St. Matthew Catholic School | El Paso | Private school | K–8 | 0 |
| St. Matthew Catholic School | San Antonio | Private school | PK–8 | 0 |
| St. Matthew's Episcopal School | Austin | Private school | PK–K | 0 |
| St. Matthew's Episcopal School | Edinburg | Private school | PK–5 | 0 |
| St. Michael Catholic School | Weimar | Private school | PK–8 | 0 |
| St. Michael Catholic School - Houston | Houston | Private school | PK–8 | 0 |
| St. Michael's Catholic Academy | Austin | Private school | 9–12 | 0 |
| St. Michaels Catholic School | Cuero | Private school | PK–6 | 0 |
| St. Monica Catholic School | Dallas | Private school | PK–8 | 0 |
| St. Monica Catholic School | Converse | Private school | PK–8 | 0 |
| St. Patrick Cathedral School | El Paso | Private school | K–8 | 0 |
| St. Patrick Catholic School | Lufkin | Private school | PK–8 | 0 |
| St. Patrick Catholic School | Dallas | Private school | PK–8 | 0 |
| St. Patrick School | Corpus Christi | Private school | PK–6 | 0 |