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IR Tanger was created by the fusion of several clubs in 1944. In the early 1990s, IR Tangier became one of the most successful clubs in the Botola. However, the club failing to win any trophies, although they came close in the 1989–90 season when they finished as runners-up. The 1989 season was considered by many to be their best season, as the team was victorious over many other notable Botola clubs, defeating Raja Casablanca 3-1 and Maghreb de Fès 3–0.

During the late 1990s, IR Tanger failed to achieve anything besides maintaining itself in the Botola. The club ended up getting relegated twice before the early 2000s, finishing unsuccessfully during the 1995–96 and 1997–98 seasons.

In July 2000, the club hired Coach Omar Raiss. He oversaw the improvement in the club's performance during the 2000–01 season, during which they scored 50 goals. Because of their performance, the club received a promotion. Their performance declined, however, with their only notable achievement in the early 2000s being a Throne Cup they won during the semi-final in the 2005–06 season. The following season became IR Tanger's last in the Botola for the next few years. During this time, the club's results were poor, and they would very often finish unsuccessfully.

During later years, after IR Tanger set up a new directive committee, it nearly made it back to the Botola during the 2013–14 season. With a series of transfers and the arrival of Coach Mohamed Amine Benhachem, the team cruised through the 2014–15 season, losing only twice and finishing first by a five-point lead.

During the 2015–16 season, the team made a comeback to the Botola Pro. The club contracted with many local and foreign players, finishing third in their first season and qualifying for the 2017 CAF Confederation Cup for the first time.