Penygroes railway station was located in Penygroes, Gwynedd, Wales. The narrow gauge, horse-drawn Nantlle Railway had a station near the site from 1856. From the outset timetables appeared regularly in the "Carnarvon & Denbigh Herald" and in Bradshaw from October 1856. In 1865 the narrow gauge line was closed, to be replaced and updated to standard gauge with contemporary facilities. It reopened in its eventual form in 1867 and closed in December 1964. The station served as the junction station for the short branch to Nantlle which was overlain in 1872 on part of the former Nantlle Railway route, but its main purpose was for traffic on the former Carnarvonshire Railway line from Caernarvon to Afon Wen and beyond.