Post is a city in and the county seat of Garza County, Texas, United States. The population was 3,708 at the 2000 census. One of Post's civic boosters is Giles Connell McCrary, Sr. , who served as mayor from 1969-91. He is an oil operator, rancher, art collector, investor, philanthropist, and the owner of the OS Ranch Museum, which features art and exhibits from throughout the world.