Below is a list of Gregg County TX zip codes. For your research we have also included Gregg County Area Code, Time Zone, UTC and the local County FIPS Code. Each Gregg County Texas zip code has a center Longitude / Latitude point (the Gregg County center is -94.777397155762 / 32.493198394775). For your convenience we have also indicated if that zip code in Gregg County observes Daylight Savings time.