| Business | Phone |
| Three Rivers Elementary School 108 N School Rd, Three Rivers 78071 | (361) 786-3592 |
| Three Rivers High School 108 N School Rd, Three Rivers 78071 | (361) 786-3531 |
| Three Rivers Junior High Schl 108 N School Rd, Three Rivers 78071 | (361) 786-3803 |
| Three Rivers Superintendent's 108 N School Rd, Three Rivers 78071 | (361) 786-3626 |