There are 5 US Post Offices in Pike County serving a total of 42,134 residents equating to 8,427 residents per post office. It's estimated that approximately 67,251 packages are handled across the 5 county post offices annually. Pike County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 40,404. The county seat is Magnolia. Pike County is named for explorer Zebulon Pike. Pike County is part of the McComb, MS Micropolitan Statistical Area."