This is list of reeves and mayors of Waterloo, Ontario, Canada. Waterloo was incorporated as a village in 1857, became a town in 1876, and a city in 1948.

Village of Waterloo

Reeves:

• Moses Springer, 1857–1862
• Daniel Snyder, 1862
• John Hoffman, 1863–1866
• Moses Springer, 1867–1869
• George Randall, 1870–1872
• Moses Springer, 1873–1876

Town of Waterloo

• Moses Springer, 1876–1877
• George Randall, 1878
• Christian Kumpf, 1879–1880
• Benjamin Devitt, 1881–1883
• George Moore, 1884
• William Snider, 1885–1886
• Jacob Conrad, 1887
• Christian Kumpf, 1888–1889
• George Moore, 1890
• William Snider, 1891–1892
• Walter Wells, 1893
• Robert Y. Fish, 1894
• Simon Snyder, 1895–1897
• Jeremiah B. Hughes, 1898
• George Diebel, 1899–1900
• David Bean, 1901–1903
• Jacob Uffelmann, 1904–1905
• Edward F. Seagram, 1906–1907
• John Fischer, 1908
• Andrew Weidenhammer, 1909
• Levi Graybill, 1910–1911
• John B. Fischer, 1912–1913
• John R. Kaufman, 1914–1915
• Dr. William L. Hilliard, 1916–1917
• William H. Kutt, 1918–1919
• Daniel Bohlender, 1920–1921
• William G. Weichel, 1922–1923
• William Henderson, 1924–1925
• William D. Brill, 1926–1928
• Louis F. Dietrich, 1929–1930
• William Uffelman, 1931
• Daniel Bohlender, 1932
• Walter W. Frickey, 1933–1934
• Henry E. Ratz, 1935–1936
• Wes McKersie, 1937–1940
• William D. Brill, 1941–1942
• Frank B. Relyea, 1943
• Albert R. Heer, 1944–1946
• Wilfred L. Hilliard, 1947

City of Waterloo

• Wilfred L. Hilliard, 1948
• Vernon Bauman, 1949–1951
• Donald A. Roberts, 1952–1953
• Frank N. Bauer, 1954–1955
• Leo J. Whitney, 1956–1957
• Harold Paikin, 1958–1959
• James S. Bauer, 1960–1965
• Arthur C. Paleczny, 1966–1967
• Donovan P. Meston, 1968–1974
• Herbert A. Epp, 1975–1977
• Marjorie Carroll, 1978–1988
• Brian Turnbull, 1988–1997
• Joan McKinnon, 1997–2000
• Lynne Woolstencroft, 2000–2003
• Herbert A. Epp, 2003–2006
• Brenda Halloran, 2006–2014
• Dave Jaworsky, 2014–2022
• Dorothy McCabe, 2022–present