Maharaja Sher Singh (December 1807 - September 16, 1843) is a Sikh ruler of the sovereign country of Punjab and the Sikh Empire.

He is the son of Maharaja Ranjit Singh and Queen Rani Mehtab Kaur (not to be confused with Maharani Mahtab Devi Sahiba, d/o Maharaja Sansar Chand of Kangra, another wife of Maharaja Ranjit Singh) who is also the mother of Prince Tara Singh (1807-1859).

He becomes Maharaja on January 20, 1841, after the sudden death of Nau Nihal Singh, whose death had been set in motion, some say purposely, while returning from his father's cremation.

He is the half brother of Nau Nihal's father, Maharaja Kharhak Singh.