There are 9 US Post Offices in Garvin County serving a total of 30,943 residents equating to 3,438 residents per post office. It's estimated that approximately 49,388 packages are handled across the 9 county post offices annually. Garvin County is in south-central Oklahoma. As of the 2010 census, the population was 27,576. Its county seat is Pauls Valley. In 1906, delegates to Constitution Convention formed Garvin County from part of the Chickasaw Nation, Indian Territory The county was named for Samuel J. Garvin, a local Chickasaw rancher, merchant and banker. Its economy is largely based on farming, ranching and oil production.