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.
This geographical designation is recognized by the towns of Ammanford and villages: Pontamman, Glanamman, Brynamman, Rhosamman. Moreover, Garnant and Betws are located in the Amman Valley - formerly known as Cwmamman, now serving as the name for their combined urban authority.