On the Lakeshore East line, the station is located on the shore of Lake Ontario in the West Rouge neighbourhood of the district of Scarborough.

Port Union was the easterly end of this helper service with a siding that ran behind the station for waiting locomotives, and a water tower and fuel tanks to resupply westbound trains.

With the advent of diesel-electric power those facilities were no longer required[3] and Canadian National Railway subsequently replaced the station with a utilitarian brick building.

A triangle of land could be obtained 500 metres to the east, on the south side of Lawrence Avenue, that would provide enough space for parking and a bus loop with direct access from the street.

When construction of the new GO Train facilities commenced, this was the site chosen for the Premier of Ontario John Robarts to ceremonially turn the first sod.