Alexander Henderson Manning (11 May 1819 – 20 October 1903) was a Canadian contractor, businessman, and the 20th Mayor of Toronto, serving a single term in 1873 and a second in 1885. Born in Ireland, he emigrated to Toronto in 1834. He worked on the construction of several projects, including the Welland Canal and the Library of Parliament. He was elected as alderman for Toronto City Council, representing St. Lawrence Ward in 1856 and 1857. He was re-elected as an alderman from 1867-1873. He was selected by the Toronto City Council to be mayor in 1873, but was not reelected the following year when the mayor was chosen by popular vote. He won the election for mayor of Toronto in 1884, but was again unsuccessful in his reelection bid the following year. In his later life, Manning was an inve