Below is a list of Rockwall County TX zip codes. For your research we have also included Rockwall County Area Code, Time Zone, UTC and the local County FIPS Code. Each Rockwall County Texas zip code has a center Longitude / Latitude point (the Rockwall County center is -96.374496459961 / 32.925701141357). For your convenience we have also indicated if that zip code in Rockwall County observes Daylight Savings time.