Oscar Ernest Fleming (March 17, 1862[1] – November 29, 1944) was a lawyer and politician in Ontario, Canada.

[1] The son of Samuel Fleming and Sophia M. Harwood, he was born in Milton, Halton County, Canada West and was educated in Windsor.

[2] He articled in law in Toronto, was called to the bar in 1885 and set up practice in Windsor.

[3] In 1919, he became president of the Canadian Deep Waterways and Power Association, an association to promote the building of a seaway connecting the Great Lakes to the Atlantic Ocean.

[5] Oscar Fleming died in Toronto on November 29, 1944.