Manohar Singh (12 April 1938 – 14 November 2002) was an Indian theatre actor-director and character actor in Hindi films.

[3] As a theatre actor his best known performances were in Tughlaq, directed by Ebrahim Alkazi; Himmat Mai and Begum Barve by Nissar and Amal Allana.

In 2003, a photo exhibition on his work in theatre was organized at the Art Heritage gallery, Delhi chronicling his journey in theatre starting from his first play The Caucasian Chalk Circle (1968), as a student at the National School of Drama, to plays such as Tughlaq, King Lear, Kaho Katha Khajuraho Ki, Himmat Mai (Mother Courage) and The Threepenny Opera.

Born in 1938 in a very small village called Kwara near Shimla in Himachal Pradesh, Manohar Singh got his first job in the state government-run Drama Division.

After quitting NSD in the late 80s, he got active in the Delhi theatre scene, doing some memorable plays such as Pagla Raja (King Lear), Himmat Mai (Brecht's Mother Courage), Begum Barve and Nagamandalam (Girish Karnad), with well-known theatre personalities, Amal and Nissar Allana.