Singh (meaning Lion) /ˈsɪŋ/ is a middle name, or surname used in South Asia, mainly in India, the last name derives from the Hindu Rajput of Rajasthan & other Northern areas of India.

In the works of Harry Turtledove Singh may refer to the following characters:

Sgt. Singh, a police forensics specialist and minor character in The Two Georges.
Singh (Supervolcano), a Junipero High School student and minor character in Supervolcano: All Fall Down.