Chattampi Swamikal (25 August 1853 – 5 May 1924) was a Hindu sage and social reformer. His thoughts and work influenced the launching of many social, religious, literary and political organisations and movements in Kerala and for the first time gave voice to those who were marginalised.

Chattampi Swamikal denounced the orthodox interpretation of Hindu texts citing sources from the Vedas. Swamikal along with his contemporary, Narayana Guru, strived to reform the heavily ritualistic and caste-ridden Hindu society of the late 19th century Kerala. Swamikal also worked for the emancipation of women and encouraged them to come to the forefront of society. Swamikal promoted vegetarianism and professed non-violence (Ahimsa). Swamikal believed that the different religions are different paths leading to the same place. Chattampi Swamikal throughout his intellectually and spiritually enriched life maintained a large number of friends from different regions of Kerala. He authored several books on spirituality, history, and language staying with these friends.