There are 3 US Post Offices in Tunica County serving a total of 11,007 residents equating to 3,669 residents per post office. It's estimated that approximately 17,568 packages are handled across the 3 county post offices annually. Tunica County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 10,778. Its county seat is Tunica. The county is named for the Tunica Native Americans. Most migrated to central Louisiana during the colonial period. Tunica County is part of the Memphis, TN\u2013MS\u2013AR Metropolitan Statistical Area. It is located in the Mississippi Delta region. Since the late 20th century, it is known for Tunica Resorts (formerly Robinsonville), an unincorporated community that is the site of nine casino resorts. It is one of the top six destinations in the country in terms of gambling revenues."