There are 6 US Post Offices in Franklin County serving a total of 25,265 residents equating to 4,211 residents per post office. It's estimated that approximately 40,326 packages are handled across the 6 county post offices annually. Franklin County is a county of the U.S. state of Alabama. As of the 2010 census, the population was 31,704. Its county seat is Russellville. Its name is in honor of Benjamin Franklin, famous statesman, scientist, and printer. It is a dry county, although the city of Russellville is wet."