The Coryell County Courthouse in Gatesville, Texas, United States. The courthouse was built in 1897-1898 out of limestone and red sandstone. The courthouse and surrounding historic district were listed on the National Register of Historic Places on August 18, 1977. – Larry D. Moore, CC BY 4.0 – Wikimedia Commons Coryell County is located in Texas. About 75,503 people live here. Between 2010 and 2020, the population grew from 75,388 to 83,093. The area covers about 2,737.0 square kilometers. The region is divided into 3 Municipalities. The region was founded in 1854. Coryell County is county in Texas, United States. More information at www.coryellcounty.org.