Trepan Singh Negi (17 March 1923 – 3 February 1996) was an Indian politician. He was a member of the 6th and 7th Lok Sabha. He represented the Tehri Garhwal Lok Sabha Constituency and was a member of the Congress political party. He was elected to the 2nd, 3rd, and 4th Uttar Pradesh Assembly from Tehri Assembly Constituency.

Trepan Singh Negi was born in Dalla, Uttarakhand on 17 March 1923. He was the son of Shri Hari Singh Negi and Smt. Savitri Devi. He attended Mendadhar Basic School, Dalla, and his secondary education came at Uttarkashi. He attended High School and Intermediate: Pratap Inter College, Tehri (1942) and (1944). He earned a Bachelor of Arts degree in Lahore (1945–1947) and a Bachelor of Law (Advocacy) degree in Lucknow (1952-1955).

Negi discussed the abandonment of merit scholarships in protest against the monarchy in 1941. Additionally, he wanted to make Tehri an independent, princely state.

Negi played a key role in the Praja Mandal movement under the leadership of Sridevi Suman in 1941. During his education in Lahore, he worked openly for Praja Mandal and remained underground.

Negi played an important role in the freedom movement while living in Praja Mandal. In 1947, when the country became independent, the Praja Mandal started a movement in Tehri against the separation of Tehri state from the Union of India which led to arrests of its members. To keep the movement alive, Negi along with Kushal Singh Rangad escaped through the forest.

Negi participated in organizing workers in Mussoorie against the Tehri monarchy.

Trepan Singh Negi was sent to Tehri Jail. The state government released him after 60+ days of imprisonment.

Negi had vowed that he would not return home until the princely state of Tehri became independent. He led a protest to Kirtinagar and narrowly escaped indiscriminate firing by the constables. He was hit by a bullet and suffered a serious head injury.