Stephens City is an incorporated town in the southern part of Frederick County, Virginia, United States, with a population of 2,016 at the time of the 2020 census, and an estimated population of 2,096 in 2022. Founded by Peter Stephens in the 1730s, the colonial town was chartered and named for Lewis Stephens in October 1758. It was originally settled by German Protestants from Heidelberg.

Frederick County is located in the Commonwealth of Virginia. As of the 2020 census, the population was 91,419. Its county seat is Winchester. The county was formed in 1743 by the splitting of Orange County. It is Virginia's northernmost county. Frederick County is included in the Winchester, VA-WV Metropolitan Statistical Area, which is also included in the Washington-Baltimore-Northern Virginia, DC-MD-VA-WV-PA Combined Statistical Area.