Law Enforcement Agencies in Waterloo, TX TX › Williamson County Agencies serving the city of Waterloo in TX. Agency Types in Waterloo Adult Institutions 1 agencies Coroners 1 agencies Municipal Police 1 agencies All Agencies in Waterloo, TX Office Of The Williamson County Justice of the Peace Williamson County T Don Hutto Detention Center Williamson County Taylor Police Department Williamson County
