Mohinder Singh GCSI (1852-1876) was the Maharaja of Patiala from 1862 to 1876.

Mohinder Singh was the son of Narinder Singh, Maharaja of the State of Patiala. He was a member of the Phulkian Dynasty and succeeded to the throne in 1862 while still a child, so a council of regency ran the state government until he came of age in 1870. The project of the Sirhind Canal was sanctioned and completed during his reign , the State contributing one crore and twenty lakhs, as its share towards the cost of its construction. Mohindra College was founded and endowed with a palatial building, for the promotion of higher education, which was given free. The telegraph line between Patiala and Ambala was also constructed during this reign.^[1] In the 1870 Birthday Honours, he was appointed a Knight Grand Commander of the Order of the Star of India.^[2]

Dying in 1876, Mohinder Singh was succeeded as Maharaja by his young son Rajinder Singh (born 1872).