George Harrison Dunbar (April 12, 1876 – ) was an Ontario political figure. He represented Ottawa South in the Legislative Assembly of Ontario as a Conservative and then Progressive Conservative member from 1937 to 1959.
He was born in Richmond, Ontario, the son of Thomas Dunbar, and was educated in Kemptville. In 1892, he married a Miss Coxford. He served as a captain during World War I. Dunbar was controller for the city of Ottawa. He ran for mayor of Ottawa in 1938, but placed third. He served in the provincial cabinet as Minister of Municipal Affairs from 1943 to 1955 and Minister of Reform Institutions from 1946 to 1948; Dunbar was Provincial Secretary and Registrar of Ontario from 1943 to 1946 and from 1955 to 1958.
The George Dunbar Bridge which crosses the Rideau River near Carleton University in Ottawa was named in his honour.