Bishwanath Singh (died 1999) was an Indian heavyweight freestyle wrestler and Indian Army servicemember.

He also won silver medals at the 1970 and 1974 Commonwealth Games.

He should not be confused with fellow wrestlers Bishambar Singh and Bhim Singh who competed in the same period, but in different weight categories.

He was born in a Rajput family in a village called Dumrahar (Near Darauli) in Siwan, Bihar.

This biographical article related to martial arts in India is a stub.