Alltwen (or Allt-wen; translates to "white wooded slope") is a village in the Swansea Valley (Welsh: Cwmtawe) in Wales. Alltwen forms part of the community of Cilybebyll and is administered separately from adjoining Pontardawe on the opposite bank of the River Tawe.
Alltwen is served by Alltwen Primary School and the village has a rugby union club, Alltwen RFC (Welsh: Clwb Rygbi Alltwen).
Most of Allt-wen consists of farmland and woods. Occupying a strip of land in the northwest of the ward is Alltwen village, which is part of the built-up area surrounding Pontardawe.
Notable people
Alltwen was the home of Ronnie James, British LightweightBoxing Champion in the 1940s and World Title challenger in 1946