Chaudhary Devi Lal (25 September 1915 – 6 April 2001) was an Indian politician who served as 6th Deputy Prime Minister of India from 1989 to 1991 in the governments of V. P. Singh and Chandra Shekhar. Also popularly known as Tau, emerged as farmer leader from the state of Haryana, and served as the Chief Minister of Haryana first in 1977-79 and then in 1987-89.