Mound is an unincorporated community in Coryell County, Texas, United States. Its elevation is 692 feet (211 m). Although Mound is unincorporated, it has a post office, with the ZIP code of 76558.Mound was settled early in the 1850s, before most other communities in Coryell County; it did not receive a railroad line until 1882 or a post office until 1884.