Billy Dawson Koumetio (born 14 November 2002) is a French professional footballer who plays as a centre-back or left-back for Scottish Premiership club Dundee.

[6] Koumetio featured for Liverpool during the pre-season of the 2020–21 football season in friendly matches in Austria against Red Bull Salzburg and VfB Stuttgart.

[7] Koumetio made his first-ever appearance for the Reds’ first team on 9 December 2020 substituting in for Fabinho at the heart of defence in the UEFA Champions League against FC Midtjylland.

[18] On 9 August 2024, Koumetio left Liverpool and joined Scottish Premiership club Dundee on a two-year deal.

Billy Koumetio has a sister, Yzoire who signed for Liverpool Football Club Women’s Academy in September 2023.