Town Hall Address 300 W. Main St. Denison, TX 75020 United States- Grayson County Website https://www.cityofdenison.com Zoning 903-465-2720 Ext. 2437 300 W. Main St. Denison, TX 75020 United States Town Clerk 903-465-2720 Ext. 2440 300 W. Main St. Denison, TX 75020 United States Water 903-465-2720 Ext. 2441 300 W. Main St. Denison, TX 75020 United States Sewer 903-465-2720 Ext. 2441 300 W. Main St. Denison, TX 75020 United States Tax Collector 903-465-2720 Ext. 2446 300 W. Main St. Denison, TX 75020 United States Code Enforcement 903-465-2720 300 W. Main St. Denison, TX 75020 United States Town Hall Hours Monday - Friday: 8:00 AM - 5:00 PM County Grayson