| Business | Phone |
| Crime Stoppers Of San Marcos 2300 S I H 35, San Marcos 78666 | (512) 353-8477 |
| San Marcos Crime Prevention 2300 S I H 35, San Marcos 78666 | (512) 754-2270 |
| San Marcos Police Dept 2300 S I H 35, San Marcos 78666 | (512) 753-2108 |
| San Marcos Police Dept-Records 2300 S I H 35, San Marcos 78666 | (512) 754-2200 |
| San Marcos Police Property Rm 2300 S I H 35, San Marcos 78666 | (512) 754-2280 |
| San Marcos Police-Juvenile Ofc 2300 S I H 35, San Marcos 78666 | (512) 753-2300 |
| San Marcos Police-Narcotics 2300 S I H 35, San Marcos 78666 | (512) 392-4223 |
| San Marcos Police-Warrant Ofcr 2300 S I H 35, San Marcos 78666 | (512) 753-2304 |
| Texas Rangers 1400 N I H 35, San Marcos 78666 | (512) 392-0482 |