The Nair Service Society is an organisation created for the social advancement and welfare of the Nair community that is found primarily in the state of Kerala in South India. It was established under the leadership of Mannathu Padmanabha Pillai.

It came into being at a crucial stage in the history of the Nair community which was facing a crisis brought about by disunity and blind adherence to outmoded customs, beliefs and practices. They had a glorious past .but ignorance, accumulated over centuries, reinforced by inadequate education, proved disastrous for the community.