There are 5 US Post Offices in Cooke County serving a total of 35,096 residents equating to 7,019 residents per post office. It's estimated that approximately 56,017 packages are handled across the 5 county post offices annually. Cooke County is a county located in the U.S. state of Texas. At the 2010 census, its population was 38,437. The county seat is Gainesville. The county was founded in 1848 and organized the next year. It is named for William Gordon Cooke, a soldier during the Texas Revolution. It is a part of the Texoma region. Cooke County comprises the Gainesville, TX Micropolitan Statistical Area, which is also included in the Dallas\u2013Fort Worth, TX-OK Combined Statistical Area. Republican Drew Springer, Jr., a businessman from Muenster, has represented Cooke County in the Texas House of Representatives since January 2013."