Below is a list of Grayson LA zip codes. For your research we have also included Grayson Area Code, Time Zone, UTC and the local Caldwell County FIPS Code. Each Grayson Louisiana zip code has a center Longitude / Latitude point (the Grayson center is -92.109199523926 / 32.050098419189). For your convenience we have also indicated if that zip code in Grayson observes Daylight Savings time.