Ystradgynlais FC are a Welsh football club based in Ystradgynlais and are a member of West Wales Football Association.

During the 2009–10 season they finished a respectable 4th in the league and won the Premier Division Cup defeating Sunnybank 4–2.

During the 2010–11 season they managed to finish a much improved 2nd in the Neath Premier League and also reached the West Wales Cup semi-final at Stebonheath Park but lost 2–1.

They also won the Premier Division Cup for the third time by coming from behind twice to beat Seven Sisters 4–3.

For the 2020–21 season the club joined the newly formed Tier 4 West Wales Premier League.