Below is a list of Lamar County TX zip codes. For your research we have also included Lamar County Area Code, Time Zone, UTC and the local County FIPS Code. Each Lamar County Texas zip code has a center Longitude / Latitude point (the Lamar County center is -95.553703308105 / 33.656799316406). For your convenience we have also indicated if that zip code in Lamar County observes Daylight Savings time.