The hamlet of Stag's Head has developed around the crossroads where the B4342 and the B4578 meet, approximately two and a half miles west of Tregaron. It has a petrol station and a caravan park. Presumably the settlement was named Stag's Head after the public house that used to stand there, which was probably a drovers pub. The earliest documentary reference for the public house is from 1822, and it is thought to have closed at some point between 1964 and 1979.
Source: modern and historic OS maps; pint-of-history.wales - an online database which aims to record 'all the known pubs, taverns, inns, hotels, beer shops, railway station refreshment rooms and other premises in Cardiganshire which were licenced (or should have been licenced) to sell alcohol.'
M. Ryder, RCAHMW, 9th November 2018