There are 4 US Post Offices in Humphreys County serving a total of 9,276 residents equating to 2,319 residents per post office. It's estimated that approximately 14,806 packages are handled across the 4 county post offices annually. Humphreys County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 9,375. Its county seat is Belzoni. The county is named for Benjamin G. Humphreys. Humphreys County is Mississippi's newest county, having been formed in 1918. Humphreys County is located in the Mississippi Delta region. It was named 'Farm-Raised Catfish Capital of the World' in 1976 by then Governor Cliff Finch, since it produced more farm-raised catfish than any other U.S. county. 40,000 acres (160 km2) of the county are underwater and used to grow catfish. About 60% of U.S. farm-raised catfish is raised within a 65-mile (105 km) radius of the county seat, Belzoni. The title \"Catfish Capital\" has also been claimed by Savannah, Tennessee, and Des Allemands, Louisiana."