Unionville, Butler County, Pennsylvania

Unionville is a census-designated place located in Center Township, Butler County, in the U.S. state of Pennsylvania. As of the 2010 census, the population was 962.

Unionville is located in the northwestern corner of Center Township and is bordered to the southwest by the Shanor-Northvue CDP, to the north by Clay Township and to the west by Franklin Township. Pennsylvania Route 8 passes through the community, leading south 6 mi to Butler, the county seat, and north 14 mi to Harrisville.

Education
It is in the Butler Area School District. Butler Area Intermediate High School and Butler Area Senior High School are the district's comprehensive secondary schools.