Cwmllynfell (Welsh pronunciationⓘ) is a village, community and electoral ward in Neath Port Talbot county borough, Wales.

Also, a bilingual primary school, supermarket, post office, village hall, church and chapels.

The electoral ward consists of some or all of the following areas: Blaen-nant, Bryn-Melyn, Celliwarog, Cwmllynfell, Rhiw-fawr in the parliamentary constituency of Neath.

Cwmllynfell is bounded by the wards of Quarter Bach of Carmarthenshire to the northeast; Cwmtwrch of Powys to the east; Ystalyfera to the southeast; Pontardawe to the southwest; Gwaun-Cae-Gurwen to the west and Lower Brynamman to the northwest.

The results were: At 14:31 on 17 February 2018 the village was the epicentre of a 4.6 magnitude earthquake, the largest in the British Isles since 2008.