Sikh sects, denominations, traditions, movements, sub-traditions, also known as sampardai in the Punjabi language, are sub-traditions within Sikhism that believe in different approaches to practicing the religion. All sampradas believe in the One Creator God typically rejecting both idol worship and caste systems. Different interpretations have emerged over time, some of which have a living teacher as the leader. The major historic traditions in Sikhism, states Harjot Oberoi, have included Udasi, Nirmala, Nanakpanthi, Khalsa, Sahajdhari, Namdhari Kuka, Nirankari and Sarvaria.

Khalsa refers to both a community that considers Sikhism as its faith, as well as a special group of initiated Sikhs. The Khalsa tradition was initiated in 1699 by the Tenth Guru of Sikhism, Guru Gobind Singh. Its formation was a key event in the history of Sikhism. The founding of Khalsa is celebrated by Sikhs during the festival of Vaisakhi.