It gives its name to the town of Ammanford and the villages of Pontamman, Glanamman, Brynamman and Rhosamman. Garnant and Betws also lie in the Amman Valley - Garnant and Glanamman were formerly known as Cwmamman and it is now the name of their combined urban council.
It is designated by the towns of Ammanford and villages: Pontamman, Glanamman, Brynamman, Rhosamman. Furthermore, Garnant and Betws are situated in the Amman Valley - previously Cwmamman, now the name for their merged urban council.