Johannis Jacob Mol (14 February 1922 – 26 November 2017) was a Dutch-born sociologist and Professor Emeritus in Religious Studies at McMaster University.
He was President of the International Sociological Association's Sociology of Religion Research Committee from 1974-1978.
In 1978, Mol gave the Paine Lecture at the University of Missouri and was opening speaker at the International Conference for the Sociology of Religion in Tokyo, Japan.
In 1985, he was the keynote speaker for the 15th World Congress of the International Association for the History of Religions.
Mol is listed as an important figure in the social sciences, receiving dedicated entries in publications such as Encyclopaedia of Religion and Society and Sociology of Religion: An Historical Introduction.