The Sikh Rehat Maryada (alternate transliterations include Sikh Rahit Marayada^{[citation needed]} and Sikh Reht Maryada) is a code of conduct for Sikhism. This document was preceded by the Gurdwaras Act of 1925, which laid down the definition of a Sikh. In 1915 and later in 1931, attempts were made to create a modern standard rehat ("code"). In 1950 the current Sikh Rehat Maryada was produced based upon the work of Sikh scholars, seeking to better standardise Sikh practices throughout the international community.

Sikh Rehat Maryada is based on earlier codes (Rehat nama), to include:

The Sikh Rehat Maryada addresses key issues such as the definition of a Sikh, personal and communal obligations such as meditation and volunteer service, rules for gurdwara services to include appropriate music and festivals, and the conduct of assorted Sikh ceremonies.

A Sikh is defined as any person male or female who faithfully:

There are two aspects to a Sikh living. One is the adherence to a personal discipline and the development of a strong family life. The other is the involvement in communal life and to ensure community well-being and infra-structure for support of the weak within the community local and globally. This is the practical aspect of the three pillars of Sikhism promoted by Guru Nanak called Wand kay Shako (share and consume).