I took photo with Canon camera in Post, TX. – Billy Hathorn, CC BY-SA 3.0 – Wikimedia Commons Post is located in Garza County. About 4,790 people live here (as of 2020). Between 2010 and 2020, the population declined from 5,376 to 4,790. The region is at 794 meters above sea level. The area covers about 9.8 square kilometers. There are about 215 streets in Post. The region was founded in 1907. The postal codes are 79356. The dialing code is 806. The name originates from C. W. Post (American businessman) Post is city in and the county seat of Garza County, Texas, United States. Among other things, Post has museums.