Maharaj Kumar Priyobrata Singh was a member of the royal family and a political official in the princely state of Manipur, under British Raj and later Indian Union.
Priyobrata Singh was appointed a member of Manipur State Durbar in 1936 and given the portfolio of Education, Police and P.W.D.
He became a member and President of the Manipur Cultural Conference, a socio-cultural organisation, which attempted to increase understanding between the State's various ethnic groups.
He introduced exotic plants into the state, including sandalwood, Araucaria, pinus longifolia, kendu, yew, Spathodea, Eucalyptus, and Sal Deodarun.
After the election to the Manipur State Assembly, he was reappointed as Chief Minister with the concurrence of the ruling party, the Praja Shanti.