The station was the nearest to the Wenvoe Iron Mine, which was active from 1859 to 1864 and generated significant freight traffic at St Fagans.

[2] St Fagans, like many stations, fell upon leaner time in the postwar years.

For the last few years of passenger operation, only trains between Cardiff Clarence Road and Pontypridd via Creigiau called at the station.

[3] A signal box and a level crossing on the line still remain at St Fagans, but the station itself is long gone.

It has been proposed in recent years for a new station to be built at St Fagans, as bus services from the centre of Cardiff are seen by some as inadequate, and that a new rail connection would greatly improve access to the Museum of Welsh Life.