There are 3 US Post Offices in Sharkey County serving a total of 4,905 residents equating to 1,635 residents per post office. It's estimated that approximately 7,829 packages are handled across the 3 county post offices annually. Sharkey County is a county located in the U.S. state of Mississippi. Part of the western border is formed by the Yazoo River. According to the 2010 census, the population was 4,916, making it the second-least populous county in Mississippi. Its county seat is Rolling Fork. The county is named after William L. Sharkey, the provisional Governor of Mississippi in 1865. Sharkey County is located in the Mississippi Delta region."