* Annual estimated passenger usage based on sales of tickets in stated financial year(s) which end or originate at Merthyr Vale from Office of Rail Regulation statistics. Methodology may vary year on year.
Since 2008 the station has had a passing loop installed. This allowed a half hourly service to be introduced on the branch from the May 2009 timetable change. Previously (up until 1991) a loop had existed at Black Lion Crossing, a short distance to the south, which also controlled the siding connections into Merthyr Vale Colliery.