Tonteg shown within Rhondda Cynon Taf
|Principal area||Rhondda Cynon Taf|
|Ceremonial county||Mid Glamorgan|
|Sovereign state||United Kingdom|
Tonteg is a village around three and a half miles (6 km) from Pontypridd, south Wales. It is 9 miles (14.5 km) north west of Cardiff and four miles (6.5 km) north east of Llantrisant. The village is within the community of Llantwit Fardre. Tonteg is to the north west of the Garth Mountain, on the west side of the River Taff valley, at the top of a hill known locally as Powerstation Hill. The hill gets its name from the Upper Boat power station which was situated at the bottom of the hill until it was demolished in 1972. Tonteg is next to Church Village and the boundaries between the two villages are blurred. A significant part of the Treforest Industrial Estate falls within the Willowford area of Tonteg.
Tonteg Hospital exists in the north of the village, now surrounded by housing estates. It was originally an isolation hospital treating contagious diseases. Nowadays it provides mental health care and other services. No emergency services are provided.
Gwauncelyn Primary School serves the local community.
Two main areas of local businesses exist along Main Road through the village and in the center of one of the housing estates (Cardigan Close area). Tonteg still has a post office.
Tonteg used to have at differing times two stations - both called Tonteg Halt railway station - on two former railway lines that ran nearby; Barry Railway and the Llantrisant and Taff Vale Junction Railway. After 1930 the original Tonteg Halt was moved to Tonteg Junction after track rationalisation; the name Tonteg Halt was used for this station.
The existence of the railways in the area around Power Station Hill has been obliterated by the Church Village bypass (described below), though some remnants exist between Tonteg and Treforest and to the south of the village towards Church Village.
There existed plans for a new station to be built on the remaining Pontypridd-Cardiff line between Treforest and Treforest Estate to serve the village, although its location would have been at the bottom of Power Station Hill and access to the village difficult.
Rhondda Cynon Taf, the local authority, has constructed a bypass to reduce traffic congestion on the A473, Pontypridd to Bridgend (Welsh: Penybont ar Ogwr) road, at Tonteg, Church Village (Welsh: Pentre'r Eglwys) and Llantwit Fardre (Welsh: Llanilltud Faerdref). The Church Village bypass, as it is known, is built as a single carriageway, with crawler and overtaking lanes around roundabouts and was completed in Autumn 2010.
- The Welsh Academy Encyclopaedia of Wales. John Davies, Nigel Jenkins, Menna Baines and Peredur Lynch (2008) pg 507 ISBN 978-0-7083-1953-6
- "Church Village Bypass - Web Online". Church Village Bypass website. Rhondda Cynon Taf CBC, Costain and the Welsh Assembly Government. 2009. Retrieved 2009-04-175.
- "WalesOnline - News - South Wales Valleys - Pontypridd & Llantrisant - Safety worries discounted as bypass work begins". Wayne Nowaczyk, Pontypridd Observer. Media Wales Ltd. 2008-12-11. Retrieved 2009-04-17.
- www.geograph.co.uk : photos of Tonteg and surrounding area
-  WWW.TRACKBED.COM : photos of Tonteg Junction railway station