Oliver Aiken Howland, CMG KC (April 18, 1847 – March 9, 1905) was a Toronto lawyer and political figure. He represented Toronto South in the Legislative Assembly of Ontario from 1894 to 1898 and was mayor of Toronto from 1901 to 1902. Howland was appointed a Companion of the Order of St Michael and St George (CMG) during the visit to Toronto of the Duke and Duchess of Cornwall and York (later King George V and Queen Mary) in October 1901. His older brother William Holmes Howland also served as 25th Mayor of Toronto a decade and a half earlier.