Unionville, PA -- U.S. borough in Pennsylvania Population (2000): 313 Housing Units (2000): 127 Land area (2000): 0.264714 sq. miles (0.685607 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.264714 sq. miles (0.685607 sq. km) FIPS code: 78616 Located within: Pennsylvania (PA), FIPS 42 Location: 40.906577 N, 77.876044 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Unionville, PA Unionville