Unionville, Chester County, Pennsylvania
|Elevation||449 ft (136.9 m)|
|- summer (DST)||EDT (UTC-4)|
|Area code||610 and 484|
Unionville is an unincorporated community in East Marlborough Township in southern Chester County, Pennsylvania, United States. It was originally known as Jacksonville. The Unionville Village Historic District was added to the National Register of Historic Places in 1979.
Unionville High School was in the Southern Chester County League (SCCL) for the 2006-2007 school year, and joined the Ches-Mont league for the 2007-2008 school year. UHS is the home of the current SCCL champions in boys' soccer and football.
- John H. Pugh (1827–1905), represented New Jersey's 2nd congressional district in the United States House of Representatives, 1877-1879
- I. Milton Smith, poet in the latter half of the nineteenth century; born in Unionville
- Pisasale, Gene (June 2, 2014). "Unionville Retains 19th-Century Charm". The Hunt. Baltimore, MD: MediaTwo. Retrieved July 14, 2014.
- Staff (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
- John Howard Pugh, Biographical Directory of the United States Congress. Accessed August 27, 2007.