* Annual estimated passenger usage based on sales of tickets in stated financial year(s) which end or originate at Llangammarch from Office of Rail Regulation statistics. Methodology may vary year on year.
All trains serving the station are operated by Arriva Trains Wales. On Mondays to Saturdays there are four trains a day in each direction, northbound to Shrewsbury and southbound to Swansea, while on Sundays there are two services each way. Llangammarch is a request stop: passengers wishing to board a train here must signal to the driver; those wishing to alight must inform the train conductor.