[1] The original Unionville station was opened in 1871 by the Toronto and Nipissing Railway.

[citation needed] It is located on Station Lane, near Main Street Unionville.

By the end of May 2022, Metrolinx had completed a number of station improvements as part of GO Expansion to support future all-day, two-way service on the Stouffville line.

The improvements include:[1] [6] Viva service began on October 16, 2005, with buses stopping near Kennedy Road.

Unionville was the eastern terminus of the now defunct Viva Pink service to Richmond Hill Centre and Finch station.