The Chief Khalsa Diwan (abbr. C.K.D.) or Chief Khalsa Diwan Charitable Society (abbr. C.K.D.C.S.) is a Sikh organisation that is the central organization of various Singh Sabhas spread across Punjab, India. Unlike the Shiromani Gurudwara Prabandhak Committee, the C.K.D. is an apolitical body and only concerns itself with religious, educational and cultural issues. The organization originally controlled Sikh religious and educational concerns and was an advocate of Sikh political rights, though it presently is mostly limited to educational spheres. It was the main council of Sikhs until the birth of more radical organizations, such as the Central Sikh League (est. 1919), the S.G.P.C. (est. 1920), and the Akali Dal (est. 1920).

The organization was originally planned as the replacement and amalgamation of the Khalsa Diwan Amritsar and Khalsa Diwan Lahore, as both these institutions had been embroiled in conflict that was hindering the progress of the on-going Singh Sabha movement. On Vaisakhi day in 1901, a public meeting was convened at the Malwai Bunga in Amritsar that established a committee to work towards setting up a unitary fellowship. A draft of the planned body was adopted on 21 September 1902.

The Chief Khalsa Diwan was established on 30 October 1902. The organisation was founded by Bhai Vir Singh, Arjan Singh Bagrian, Sundar Singh Majithia, Tarlochan Singh, and Harbans Singh Attari. The opening session of the organization was held at the Malwai Bunga within the Golden Temple complex of Amritsar on the same day as the organization's establishment. The opening session had a performance of the Sikh ardas, which was carried-out by Teja Singh of Bhasur. In the first session, the following persons were elected to high positions within the organization:

A sum of twenty-five Singh Sabha chapters (representing congregations in Amritsar, Rawalpindi, Agra, Bhasaur, Badbar, Multan, Dakha, and Kairon) affiliated themselves with the C.K.D. after its establishment, with the total number of affiliated Singh Sabhas swelling to fifty-three within a year.

The society was dedicated to espousing Sikh cultural, educational, spiritual, and intellectual life, promoting the Guru Granth Sahib's message and teachings, disseminating Sikh history, and safeguarding of Sikh rights through diplomacy with the government. Concerted efforts were delegated to the upliftment of both Sikh women and men through the establishment of educational institutions. The C.K.D. was responsible for the publishing many works dealing with Sikh history-related subject matters and also topics related to Sikh scriptures and creed. Additionally, the organization carried out translation work, many titles written in different languages were rendered in Punjabi. Furthermore, numerous charitable establishments working towards the welfare of the wider community was founded by the C.K.D.

Aims and Objectives of Chief Khalsa Diwan:

1. To promote the spiritual, intellectual, moral, social, educational, and economic welfare of the Khalsa Panth.

2. To propagate the teachings of the Sikh gurus as embodied in the Guru Granth Sahib.