| Mercedes Early Childhood Center | PK - K | 766 | 22.5 | Mercedes, 78570 |
| Ruben Hinojosa Elementary | 1 - 4 | 547 | 15.2 | Mercedes, 78570 |
| Taylor El | 1 - 4 | 493 | 15.1 | Mercedes, 78570 |
| Travis El | 1 - 4 | 580 | 15.1 | Mercedes, 78570 |
| John F Kennedy El | 5 - 6 | 766 | 15.4 | Mercedes, 78570 |
| Mercedes J H | 7 - 8 | 727 | 12.3 | Mercedes, 78570 |
| High School For Health Professions | 9 - 12 | 661 | 13.6 | Mercedes, 78570 |
| Mercedes Alter Academy | 9 - 12 | 60 | 13.0 | Mercedes, 78570 |
| Mercedes H S | 9 - 12 | 1,288 | 13.3 | Mercedes, 78570 |
| Mid-Valley Academy | 9 - 12 | 52 | 16.2 | Mercedes, 78501 |
| Santa Maria Alternative | 12 | 1 | | Mercedes, 78592 |
| South Palm Gardens H S | 9 - 12 | 61 | 6.6 | Mercedes, 78599 |
| The Science Academy | 9 - 12 | 640 | 14.3 | Mercedes, 78570 |
| Guidance Center | 7 - 10 | 9 | 1.5 | Mercedes, 78599 |
| Hidalgo Co J J A E P | PK - 12 | 0 | | Mercedes, 78570 |
| Mercedes Daep | 5 - 12 | 38 | 11.2 | Mercedes, 78570 |
| Cameron Co J J A E P | | | | Mercedes, 78570 |
