Princeton is a town in Johnston County, North Carolina, United States. As of the 2010 census it had a population of 1,194. Each May the town celebrates Princeton Community Day, a festival dedicated to promoting community involvement and town pride. The town holds municipal elections in November in odd-number years to elect its mayor and town council.

Johnston County is a county located in the U.S. state of North Carolina. As of the 2020 census, the population was 215,999. Its county seat is Smithfield.