Below is a list of Grimes County TX zip codes. For your research we have also included Grimes County Area Code, Time Zone, UTC and the local County FIPS Code. Each Grimes County Texas zip code has a center Longitude / Latitude point (the Grimes County center is -95.964401245117 / 30.548000335693). For your convenience we have also indicated if that zip code in Grimes County observes Daylight Savings time.