Hengoed is a village on the west side of the Rhymney Valley in Glamorgan. It is found between Ystrad Mynach to the south and Cefn Hengoed to the north. Across the valley it looks towards Maesycwmmer in Monmouthshire.
The name literally means 'old wood' in the Welsh language.
Hengoed and Cefn Hengoed occupy a low plateau of Pennant Sandstone typical of much of the South Wales coalfield, between the Nant Cylla (eng. Cylla Brook) to the east and the River Rhymney to the west rising to a high point between the two villages.
Hengoed has a primary school, community centre, a newsagent, a post office and a public house - The Junction. There is also a Park|linear park, along the old railway line which connected Penallta Colliery with Hengoed Viaduct and beyond.
Hengoed railway station is part of the Valley Lines network. Around 85 trains call at the station every weekday.