Mohnish Bahl (born 14 August 1961) is an Indian actor working in the Indian film industry and on Indian television.

Mohnish Bahl debuted with the film Bekarar in a supporting role opposite Padmini Kolhapure and Sanjay Dutt but the film was a critical and commercial failure. His subsequent release was Teri Bahon Mein, a remake of The Blue Lagoon with Ayesha Dutt, wife of Jackie Shroff, which was also a failure. His only commercial success in a leading role was Purana Mandir though it was considered a B grade film. The 1999 film Hum Saath-Saath Hain is considered the film that transformed Bahl's career. He has starred in over 100 films, and has been nominated for two Filmfare Awards.

Bahl was born in Mumbai, Maharashtra, India. He is the only son of noted actress Nutan and Lt. Cdr. Rajnish Bahl, and is a prominent member of the Mukherjee-Samarth family.

He married actress Aarti Bahl on 23 April 1992 and they have two children: actress Pranutan Bahl and Krishaa Bahl.