This is a list of mayors of St. John's, Newfoundland and Labrador.
Between 1888-1898 council consisted of five councillors elected by wards and two members appointed by the Newfoundland government. Then from 1898-1902 government by commission. In 1902, legislation passed that dictated a municipal council would be formed by six councillors-at-large and one mayor, elected by those citizens of St. John's who pay property taxes. The city council currently comprises 11 members: the Mayor, the Deputy Mayor and nine councillors, five which represent wards throughout the city and four that are elected at large.
| June 19, 1902 | June 26, 1906 | ||
| June 26, 1906 | June 27, 1910 | ||
| June 27, 1910 | July 1, 1914 | ||
| July 1, 1914 | June 29, 1916 | ||
| June 29, 1916 | December 15, 1921 | ||
| December 15, 1921 | December 9, 1929 | ||
| December 9, 1929 | March 31, 1932 | ||
| March 31, 1932 | November 8, 1949 | ||
| November 8, 1949 | November 16, 1965 | ||
| November 16, 1965 | November 13, 1973 | ||
| November 13, 1973 | November 3, 1981 | ||
| November 3, 1981 | November 13, 1990 | ||
| November 13, 1990 | November 9, 1993[1] | ||
| November 9, 1993 | September 30, 1997 | ||
| September 30, 1997 | March 3, 2008 | ||
| Dennis "Doc" O'Keefe (Acting) | March 3, 2008 | April 22, 2008 | |
| Suzanne "Shannie" Duff (Acting) | April 22, 2008 | June 9, 2008 | |
| June 9, 2008 | September 26, 2017[2] [3] | ||
| September 26, 2017[4] | present |