Youssouf Hadji (also spelled Youssef Hadji, Arabic: يوسف حجي, Berber languages: ⵢⵓⵙⴼ ⵃⴰⵊⵊⵉ; born 25 February 1980) is a Moroccan former professional footballer who played as an attacking midfielder. He notably had three spells for French side AS Nancy, also serving as the team captain, making 378 appearances and scoring 95 goals for the club. At international level, he represented the Morocco national team earning 64 caps and scoring 16 goals.

He is the younger brother of former Moroccan star Mustapha Hadji and the uncle of striker Samir Hadji. In May 2016, he won the 2015–16 Ligue 2 with AS Nancy.

He currently serves as a member of the technical staff of the Moroccan national football team, and second assistant to coach Mohamed Ouahbi.

Hadji started his career at AS Nancy in Ligue 1 under the guidance of László Bölöni. Nancy were relegated to Ligue 2 in 2000, but Hadji remained loyal and played on for another three seasons.

In 2003, Hadji moved to Corsica to play for SC Bastia in Ligue 1. After his old team were relegated at the end of his second season there, he reunited with Bölöni at Rennes. In Brittany, he was not a regular starter but contributed largely to their season with 3 goals and 3 assists.

On 10 January 2007, Hadji re-joined AS Nancy from Rennes for an estimated £1.2m.

On 31 August 2011, after four years at Nancy, Hadji returned to Rennes, for one season with the Ligue 1 team.

Hadji signed a two-year contract with Qatari side Al-Arabi on 26 June 2012. Sidelined due to injuries for most of the season, he terminated his contract after only one season making only 8 appearances in all competitions.