Youssouf Mulumbu (born 25 January 1987) is a Congolese professional footballer.
Born in Kinshasa, Zaire, Mulumbu joined Paris Saint-Germain (PSG) in 2004.
It was reported by the French media on 26 January 2009 that he joined Premier League team West Bromwich Albion on a trial basis. On 2 February 2009, the January transfer deadline day, he joined them on loan with a view to a permanent deal at the end of the season. Mulumbu's first term at The Hawthorns was interrupted by injuries and he had to wait until April to make his Premier League debut, coming on as a sub in a 2–2 draw at Portsmouth. He signed for West Brom permanently on a one-year contract for a fee of £175,000 on 10 July 2009.
He was named West Brom's Player of the Year by both the club and the fans at the end of the season, and signed his third contract extension in 13 months on 25 July 2011, tying himself to the club until 2015 (with the option of an extra year).
On 15 March 2014, Mulumbu scored a crucial winner for West Brom in a 2–1 victory against Swansea City at the Liberty Stadium, giving Pepe Mel his first win as head coach.
In June 2015, it was announced that Mulumbu would sign on a free-transfer for newly promoted Norwich City on 1 July 2015.
On 3 August 2015, Norwich announced that Mulumbu suffered a broken metatarsal in a friendly against Brentford which would require surgery and sideline him for several weeks, ruling him out of the start of the season