The Spooners of Porthmadog refers to the Spooner family of Porthmadog, North Wales who made important contributions to the development of narrow gauge railways both locally and throughout the world. James Spooner, together with his sons James Swinton and Charles Easton and other members of their family, constructed and managed the Ffestiniog Railway for over fifty years. In North Wales they were involved in the promotion of numerous railway schemes including many quarry lines, the Talyllyn Railway, the Festiniog and Blaenau Railway, the North Wales Narrow Gauge Railways and the Carnarvonshire Railway. Through publications and overseas family commissions they influenced narrow gauge railway construction in Russia, America and throughout the British Empire.

Porthmadog, originally Portmadoc until 1974 and locally as "Port", is a coastal town and community in the Eifionydd area of Gwynedd, Wales, and the historic county of Caernarfonshire. It lies 5 miles (8 km) east of Criccieth, 11 miles (18 km) south-west of Blaenau Ffestiniog, 25 miles (40 km) north of Dolgellau and 20 miles (32 km) south of Caernarfon. The community population of 4,185 in the 2011 census was put at 4,134 in 2019. It grew in the 19th century as a port for local slate, but as the trade declined, it continued as a shopping and tourism centre, being close to Snowdonia National Park and the Ffestiniog Railway. The 1987 National Eisteddfod was held there. It includes nearby Borth-y-Gest, Morfa Bychan and Tremadog.