Sir Ganesh Dutt Singh (1868–1943) was an Indian administrator and educationist. He did much to improve education and health services in the state of Bihar and Orissa before the independence of India from Britain. Dutt made generous donations from his earnings and personal property for the development of educational institutions, such as the Radium Institute in Patna Medical College, Darbhanga Medical College and Hospital, Ayurvedic College and schools for the blind and deaf. A short film based on the life and works of Dutt was made by Prakash Jha.

Dutt was Minister for Local Self Government of Bihar and Orissa under British rule, and one of the major public figures of the province of Bihar. Sir Ganesh Dutt donated his house Krishna Kunj to Patna University to start the Patna University Institute of Psychological Research and Service, one of the oldest psychological service centres in Eastern India in 1945 on the initiative of Sir Chandeshwar Prasad Narayan Singh Sinha, the Vice-Chancellor of Patna University. Dutt saved nearly three-quarters of his salary each month for 14 years to give it to various charities to benefit orphans, widows, and schools in the state.