For the dynasty and empire founded by Seljuk, see Seljuk Turks.

Seljuk (in Arabic Saljūq; in Turkish Selçuk; also Seldjuk, Seldjuq, Seljuq) was the bey (chieftain) of a branch of Oghuz Turks known as the Seljuk Turks. He founded the Seljuk dynasty around year 1000. He was succeeded by his son, probably by the name of Mikhail . Seljuk's grandson Toghrül conquered Persia in the mid-11th century.

Selçuk is located in Asiatic Turkey.