Wenvoe Tunnel is a disused tunnel on the defunct Barry Railway that runs under Culverhouse Cross in the Vale of Glamorgan in south Wales, on the western outskirts of Cardiff. It was opened in 1889 on a line used to carry coal to Barry Docks. The line also had a sparse passenger service and closed after March 1963.

The Barry Railway Company was a railway and docks company in South Wales, first incorporated as the Barry Dock and Railway Company in 1884. It arose out of frustration among Rhondda coal owners at congestion and high charges at Cardiff Docks as well the monopoly held by the Taff Vale Railway in transporting coal from the Rhondda. In addition, the Taff Vale did not have the required capacity for the mineral traffic using the route, leading to lengthy delays in getting to Cardiff.