Reidsville is a city in Rockingham County in the U.S. state of North Carolina. At the 2020 census, the city had a total population of 14,58…Reidsville is a city in Rockingham County in the U.S. state of North Carolina. At the 2020 census, the city had a total population of 14,583. Reidsville is included in the Greensboro–High Point Metropolitan Statistical Area of the Piedmont Triad.