High School (known locally as UHS) is a public high school of the York Region District School Board. It is located in the community of Unionville in the town of Markham
. The school is located next to the local municipal offices and the Apple Creek Business Park.
Unionville High School is most well known for its enriched arts program, Arts York. The school was purpose-built to house this regional arts program, therefore it has enhanced arts facilities. Arts York is divided into 4 categories: visual arts, music, dance, and drama. In order to gain entry to these unique programs, grade eight to eleven students are required to audition.