Tyddyngwyn railway station was immediately north of the later Manod station in what was then Merionethshire, now Gwynedd, Wales. Tyddyngwyn was an intermediate station on the 1 ft 11+3⁄4 in (603 mm) narrow gauge Festiniog and Blaenau Railway (F&BR); it opened with the line on 30 May 1868. The F&BR ran the three and a half route miles northwards from its southern terminus at Llan Ffestiniog to a junction with the Ffestiniog Railway (FR) at Dolgarregddu Junction near what is nowadays Blaenau Ffestiniog station.