There are 5 US Post Offices in Madison County serving a total of 93,885 residents equating to 18,777 residents per post office. It's estimated that approximately 149,851 packages are handled across the 5 county post offices annually. Madison County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 95,203. The county seat is Canton. The county is named for U.S. President James Madison. Madison County is part of the Jackson, MS Metropolitan Statistical Area."