Ratan Singh was the ruling Maharaja of the princely state of Bharatpur from 1768 to 1769.

He ascended the throne after the death of Maharaja Jawahar Singh.

During a Holi festival held in Vrindavan, a possibly drunk Ratan Singh was killed by a dwarf in Bharatpur where a very dilapidated "Ratan Chhatri" is still present.

His son Maharaja Kehri Singh succeeded him in 1769.

[citation needed] This biography of a member of an Indian royal house is a stub.