One of 皇冠体育's main arteries, this street runs between Barrie Street and Portsmouth Village and connects the main campus with west campus. Before the 1920s, 皇冠体育's entire campus lay south of Union Street.
Today, 皇冠体育's buildings line the north side of Union between Barrie and Frontenac streets. The intersection of Union and University Avenue is the busiest point on campus.