| Business | Phone |
| Early Childhood Ctr 950 W 6th St, Mercedes 78570 | (956) 514-2344 |
| Kennedy Elementary School 801 Hidalgo St, Mercedes 78570 | (956) 514-2300 |
| Mercedes Alternative School 333 S Ohio St, Mercedes 78570 | (956) 514-2180 |
| Mercedes High School 1200 Florida St, Mercedes 78570 | (956) 514-2100 |
| Mercedes Independent Schl Dist 206 E 6th St, Mercedes 78570 | (956) 514-2000 |
| Mercedes Independent School 203 E 10th St, Mercedes 78570 | (956) 514-2021 |
| Mercedes Junior High School 500 S Mile 1 E, Mercedes 78570 | (956) 514-2200 |
| Mercedes Special Education 600 S Ohio St, Mercedes 78570 | (956) 514-2034 |
| Mid-Valley Academy 103 E 2nd St, Mercedes 78570 | (956) 565-5417 |
| Rico Elementary School 2202 N International Blvd, Mercedes 78570 | (956) 514-0406 |
| Rico Parent Connection 2202 N International Blve, Mercedes 78570 | (956) 565-6464 |
| Rubin Hinojosa Elementary Schl 500 S Rio Rico Rd, Mercedes 78570 | (956) 514-2277 |
| Science Academy 900 Med High Dr, Mercedes 78570 | (956) 565-2454 |
| South Texas Ind School Dist 100 Med High Dr, Mercedes 78570 | (956) 565-2454 |
| William B Travis Elementary 1551 S Georgia Ave, Mercedes 78570 | (956) 514-2366 |
| Wisd Alternative School 2200 Camino Real Viejo, Mercedes 78570 | (956) 565-6810 |
| Zachary Taylor Elementary Schl 900 N Missouri Ave, Mercedes 78570 | (956) 514-2388 |