Madathilparampil Mammen Thomas (1916—1996) was an Indian Christian theologian, social thinker, and activist.

He served as Governor of the Indian State, Nagaland (1990–1992), and as the Chairperson of the Central Committee of World Council of Churches (1968–1975).

In 1931, Thomas went to study Chemistry in a college in Trivandrum, Kerala, and had an evangelical spiritual experience.

[2] Soon after obtaining his degree in 1935, he accepted the post of a teacher at Ashramam High School, Perumbavoor, run by the Mar Thoma Church, where the teachers used to pay part of their meager salary to the students from poor families.

[4] He applied for ordination in the Mar Thoma Church, but that was rejected because of his membership in Communist party.