Laxmi Narayan Singh (born 4 November 1955 in Gaya, Bihar) is an Indian politician, university professor, academic, and a member of the Bharatiya Janata Party.
Also known as Tun Tun Ji, he was previously associated with the RSS and held various positions in the state BJP organization.
He contested the assembly elections in 1995 from Wazirganj (previously known as Gaya Muffassil) as a Bharatiya Janata Party candidate.