Not to be confused with Franklin, North Carolina. Franklin County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 60,619. Its county seat is Louisburg. Franklin County is included in the Raleigh, NC Metropolitan Statistical Area, which is also included in the Raleigh-Durham-Chapel Hill, NC Combined Statistical Area, which had a 2012 estimated population of 1,998,808.