El-Hadji Diouf (born 15 January, 1981) is a Sengalese footballer. He plays for Bolton Wanderers F.C. and the Senegal national team.

Liverpool F.C. bought Diouf from the French club Lens for £10,000,000 in summer 2002, just after Senegal's impressive 2002 World Cup run, beating holders France and getting to the quarter final. Diouf was named African Player of the Year in February 2003 for the second year running, for helping Senegal come runner up in African Nations Cup and the achievement in the World Cup. Diouf took the number 9 shirt at Liverpool after Robbie Fowler's departure to Leeds United and Nicolas Anelka left for Manchester City after failing to impress Gérard Houllier on a loan spell. Diouf had to contend with Milan Baros and Emile Heskey for the place up front next to Michael Owen, whilst dealing with suspensions and fines, such as the spitting incident against Celtic in the UEFA Cup semifinal. After Houllier was sacked in the summer of 2004, new manager Rafael Benitez saw a bad egg in him and loaned him out to Bolton at the start of the 2004-05 season.

Since then, Diouf has been involved in several other controversies,such as spitting in Ajran De Zeeuw's (Portsmouth FC captain) face which led to the Diouf cult being formed by Matthew Burkmar and Gary Thomasson. but his current manager Sam Allardyce has stood by him and is actively trying to help him curb his bad on-field behaviour.

His international career started in April 2000 against Benin; Diouf has earned over 30 international caps and scored over 15 goals for his country. In 2004, he was named to the FIFA 100, a list of the 125 greatest living footballers selected by Pelé in conjunction with FIFA's centenary celebrations.