Town Hall Address P.O. Box 249 Sullivan City, TX 78595 United States- Hidalgo County Website http://www.sullivancity.org Fire District 956-485-2828 P.O. Box 249 Sullivan City, TX 78595 United States Town Clerk 956-485-2828 P.O. Box 249 Sullivan City, TX 78595 United States County Hidalgo