Town Hall Address 105 Cockrell Hill Ovilla, TX 75154 United States- Ellis, Dallas County Website http://cityofovilla.org Town Clerk 972-617-7262 105 Cockrell Hill Ovilla, TX 75154 United States Water 972-617-7262 105 Cockrell Hill Ovilla, TX 75154 United States Sewer 972-617-7262 105 Cockrell Hill Ovilla, TX 75154 United States Tax Collector 972-617-7262 105 Cockrell Hill Ovilla, TX 75154 United States Code Enforcement 972-617-7262 105 Cockrell Hill Ovilla, TX 75154 United States County Ellis, Dallas