Law Enforcement Agencies in San Marcos, TX TX › Guadalupe County Agencies serving the city of San Marcos in TX. Agency Types in San Marcos Campus Police 1 agencies Coroners 2 agencies County Jails 1 agencies Municipal Police 1 agencies Sheriff 1 agencies All Agencies in San Marcos, TX Hays County Jail Guadalupe County Hays County Sheriffs Office Guadalupe County Office Of The Hays County Justice of the Peace Guadalupe County Office Of The Hays County Justice of the Peace Guadalupe County San Marcos Police Department Guadalupe County Texas State University Guadalupe County
