Below is a list of Karnack TX zip codes. For your research we have also included Karnack Area Code, Time Zone, UTC and the local Harrison County FIPS Code. Each Karnack Texas zip code has a center Longitude / Latitude point (the Karnack center is -94.170700073242 / 32.668098449707). For your convenience we have also indicated if that zip code in Karnack observes Daylight Savings time.