Northfield is a stop on the Region of Waterloo's Ion rapid transit system.

Access to the platform is from the north, directly from the Northfield Drive sidewalk; to the south, there is only an emergency egress on the eastern side, where a locked gate gives access for Ion staff to the Operations and Maintenance facility just to the south.

The station's feature wall consists of brown stone tiles with wavering variations.

Just opposite the station on Northfield Drive, in the same rail corridor, is the southern terminus of the Waterloo Central Railway tourist train to St. Jacobs and Elmira.

It marks a transition point between tracks running in the boulevard of a road in the direction of the Conestoga terminus, and open tracks running in a railway corridor in the direction of Uptown Waterloo.