Al-Ittihad Club (Arabic: نادي الاتحاد), commonly known as Al-Ittihad or simply Ittihad, is a Saudi professional football club based in Jeddah. It was founded in 1927. The club has spent its entire history in the top flight of football in Saudi Arabia, currently known as the Saudi Pro League. Ittihad has won 52 championships from which 37 are official championships.

Ittihad matches are played at Jeddah's main stadium King Abdullah Sports City, which is the second-largest stadium in Saudi Arabia, accommodating 62,345 spectators. Al Ittihad has a long-standing rivalry with Al-Hilal, which is referred to as Saudi El Clasico, and is considered the most prominent and most watched annual match.

It is the oldest sports club still surviving in Saudi Arabia, as the club was founded in 1927. The most successful period in the club history was the 1990s and the 2000s, when the club achieved a large number of titles and achievements domestically, regionally, and globally, culminating in the club securing the 4th place in the 2005 FIFA Club World Championship.

Ittihad is one of the most successful Asian club at domestic and continental level, as they have achieved the AFC Champions League title twice in a row (the first to do so), the Asian Cup Winners' Cup, the GCC Champions League and the Arab Champions League title each once. Domestically, Ittihad is also one of two successful clubs in Saudi Arabia, having won fifteen league titles, five King's Cup titles, eight Crown Prince Cup titles, three Saudi Federation Cup titles and one Saudi Super Cup.