Reynoldsburg is a city in Fairfield, Franklin, and Licking counties in the U.S. state of Ohio. It is a suburban community in the Columbus, Ohio metropolitan area. The population was 41,076 at the 2020 census.

Fairfield County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 158,921. Its county seat and largest city is Lancaster. Its name is a reference to the Fairfield area of the original Lancaster.