This is a list of the mayors of the City of Ottawa, Ontario, Canada. Until 1854, Ottawa was known as Bytown. Over the course of Ottawa's history, the borders of the municipality have greatly expanded through annexations. This most recently occurred in 2001 when a number of neighbouring communities were amalgamated with Ottawa, resulting in a new legal entity that took the name of one of its municipal predecessors.
1847 – John Scott
1848 – John Bower Lewis
1849 – Robert Hervey
1850 – John Scott
1851 – Charles Sparrow
1852 – Richard William Scott
1853 – Joseph-Balsora Turgeon
1854 – Henry J. Friel
1855–1857 – John Bower Lewis
1858–1859 – Edward McGillivray
1860–1862 – Alexander Workman
1863 – ? – Henry J. Friel
1864–1866 – Moss Kent Dickinson
1867 – Robert Lyon
1868–1869 – Henry J. Friel
1870–1871 – John Rochester
1872–1873 – Eugène Martineau
1874–1875 – John Peter Featherston
1876 – G. B. Lyon-Fellowes
1877 – William Henry Waller
1878 – Chauncey Ward Bangs
1879–1881 – Charles Herbert Mackintosh
1882–1883 – Pierre St. Jean, M.D.
1884 – Charles Thornton Bate
1885–1886 – Francis McDougal
1887–1888 – McLeod Stewart
1889–1890 – Jacob Erratt
1891 – Thomas Birkett
1892–1893 – Olivier Durocher
1894 – George Cox
1895–1896 – William Borthwick
1897–1898 – Samuel Bingham
1899–1900 – Thomas Payment
1901 – William Dowler Morris
1901 – James Davidson
1902–1903 – Fred Cook
1904–1906 – James A. Ellis
1906 – Robert A. Hastey
1907–1908 – D'Arcy Scott
1908 – Napoleon Champagne
1909–1912 – Charles Hopewell
1912 – Edward H. Hinchey
1913 – James A. Ellis
1914 – Taylor McVeity
1915–1916 – Nelson D. Porter
1917–1920 – Harold Fisher
1921–1923 – Frank H. Plant
1924 – Henry Watters
1924 – Napoléon Champagne
1925–1927 – John P. Balharrie
1928–1929 – Arthur Ellis
1930 – Frank H. Plant
1931–1933 – John J. Allen
1934–1935 – Patrick Nolan
1936–1948 – J.E. Stanley Lewis
1949–1950 – E.A. Bourque
1951 – Grenville Goodwin
1951–1956 – Charlotte Whitton
1957–1960 – George H. Nelms
1961–1964 – Charlotte Whitton
1965–1969 – Donald Bartlett Reid
1970–1972 – Kenneth H. Fogarty, Q.C.
1972–1974 – Pierre Benoit
1975–1978 – Lorry Greenberg
1978–1985 – Marion Dewar
1985–1991 – James A. Durrell
1991 – Marc Laviolette
1991–1997 – Jacquelin Holzman
1997–2000 – Jim Watson
2000–2001 – Allan Higdon
When the city of Ottawa amalgamated in 2001, these were the mayors of the municipalities that amalgamated:
Chair of the Regional Municipality of Ottawa-Carleton: Bob Chiarelli
Ottawa: Allan Higdon-acting mayor
Gloucester: Claudette Cain
Kanata: Merle Nicholds
Nepean: Mary Pitt
Vanier: Guy Cousineau
Cumberland: Gerry Lalonde -acting mayor
Goulbourn: Janet Stavinga
Osgoode: Doug Thompson
Rideau: Glenn Brooks
West Carleton: Dwight Eastman
Rockcliffe Park: Patrick J. Murray
Bob Chiarelli, 2001–06
Larry O'Brien, 2006-10
Michel Bellemare, 2 May – 8 July 2009 (Acting)
Doug Thompson, 8 July – 6 August 2009 (Acting)
Jim Watson, 2010- present
Note: Bellemare and Thompson served as acting mayor during O'Brien's leave of absence, due to Criminal Charges before the court.
