Wnion Halt in Gwynedd, Wales, was on the Ruabon to Barmouth line. The station, which was situated in a narrow part of the Wnion Valley, is next to Pont Llanrhaiadr. It was sited on the north side of the line against a road's retaining wall. The halt consisted of a short timber-edged platform with a wooden shelter and nameboard. It had passing loop or freight activity. Only rusted platform supports remain. The halt's entrance gate is now part of a driveway to a private residence.