Felin-fach is a community in Powys, Wales, northeast of Brecon. The community had a population of 673 as of the 2011 UK Census. It includes the villages, Llandyfaelog Tre'r-graig, Llanfilo and Talachddu.
- UK Census (2011). "Local Area Report – Felin-fach Parish (1170221557)". Nomis. Office for National Statistics. Retrieved 8 February 2018.
- Welcome to the Felinfach Community Council website, Felinfach Community Council website. Retrieved 27 January 2018.
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