The Koli are an agriculturist caste of India, mostly found in Gujarat. At the beginning of the 20th century, the Koli caste was recognised as a criminal tribe under Criminal Tribes Act by British Indian government. Because of their anti-social activities but during World War I, Kolis were recognised as a martial caste by British Indian Empire. Kolis of Gujarat were well-known pirates of Arabian Sea.
The Koli caste forms the largest caste cluster in Gujarat and Himachal Pradesh, comprising 24% and 30% of the total population in those states, respectively.