Knightdale is a town in Wake County, North Carolina, United States. As of the 2020 census, Knightdale has a population of 19,435, up from 11,401 in 2010. The U.S. Census Bureau estimates the town's population to be 17,843, as of July 1, 2019. Knightdale's population grew 10.4% from 2010 to 2013, making it the second fastest-growing community in the Research Triangle region for that time period.