| Robert John Fleming | |
| Order: | 27th |
| Office: | Mayor of Toronto |
| Predecessor: | Edward F. Clarke |
| Successor: | Warring Kennedy |
| Term Start: | 1892 |
| Term End: | 1893 |
| Predecessor2: | Warring Kennedy |
| Successor2: | John Shaw |
| Term Start2: | 1896 |
| Term End2: | 1897 |
| Office3: | Toronto St. David's Ward Alderman |
| Term3: | 1886–1890 |
| Birth Date: | 23 November 1854 |
| Birth Place: | Toronto, Ontario, Canada |
| Nationality: | Canadian |
| Spouse: | Margaret Jane Breadon (1879–1883) Lydia Jane Orford (1888–?) |
| Residence: | Toronto |
| Occupation: | Businessman, politician |
| Profession: | Businessman |
Robert John Fleming (November 23, 1854 - October 26, 1925) was twice Mayor of Toronto (1892–1893 and 2nd incumbency 1896–1897)
Born in Toronto, Robert John Fleming was of Irish ancestry, the son of William and Jane (Cauldwell) Fleming. Educated in Toronto public schools he first entered the business world in real estate. From there he moved on to the Toronto Railway Company becoming the general manager in 1905. He was also a member of the Orange Order in Canada.
Fleming's political career began as an Alderman for the Ward of St. David's 1886 to 1890.[1] In 1892 Toronto municipal election, he was elected mayor of Toronto. He was defeated in 1894 and 1895 but was returned to office in the 1896 Toronto municipal election and again the next year. He resigned in 1897 to accept appointment as an assessment commissioner of Toronto and held that position until 1904. In 1894, he presided over the National Exhibition Convention at Montreal. Fleming was president in 1895 of the Dominion Prohibitory Alliance. He strongly believed in the prohibition of liquor traffic.
Fleming resigned as Mayor in 1897 and ran for mayor again in the 1923 Toronto municipal election against Mayor Charles A. Maguire and was defeated.
As a businessman he was general manager of the Toronto and Niagara Power Company, general manager of the Toronto Electric Light Company and general manager of the Electrical Development Company of Ontario. He was also director of the Toronto Board of Trade. He was a member of the Toronto Harbor Commission in 1921.
Fleming Crescent in Leaside is named in his honour.
He married (first) in December 1879 Margaret Jane Breadon, who died in March 1883; she was the daughter of Christopher Breadon of Montreal. His second marriage in October 1888 was to Lydia Jane Orford, daughter of William Orford of Toronto. He was the father of four sons and five daughters. Fleming had an active interest in thoroughbred horses.
Robert John Fleming died in 1925 and was buried in Mount Pleasant Cemetery, Toronto.