The Daylamites or Dailamites are an Iranian people inhabiting the mountainous regions of northern Iran on the southern shore of the Caspian Sea.

They are employed as soldiers from the time of the Sassanid Empire, and long resist the Arab conquest of Iran and subsequent Islamization.

The Dailami Buyid dynasty emerges in the 930s and manages to gain control over much of modern-day Iran, which it holds until the coming of the Seljuk Turks in the mid-eleventh century.