Mithan Lal Roonwal (18 September 1908 – 22 July 1990) was an Indian zoologist and director of the Zoological Survey of India.
Roonwal joined the army during the Second World War and served as a Major in the 15th Punjab Regiment and received a Burma Star for his services.
He joined the Forest Research Institute in 1949 as an entomologist and worked on cataloguing the insect collections held there.
In 1956 he joined the Zoological Survey of India to succeed Sunder Lal Hora as the director.
He was the first to note geographic patterns in the shape in which gray langurs (treated in his time as a single species) carried their tails.