[2] The station was inaugurated on 26 October 1952 as a part of the line between Hötorget and Vällingby.

It was expanded in July 2017, with the opening of the City Line that provided a dedicated north–south route for the Pendeltåg, serving Odenplan on the way.

Besides the new tunnels and platforms for the City Line, new station entrances were constructed, supplementing those built for the Metro.

The other long side bends gently inwards where stairwells form seats towards the square in the best sun position.

[3] Future plans include a diversion of the Roslagsbanan narrow-gauge commuter railway in tunnel from Universitetet station via Odenplan to a terminus at T-Centralen.