Ontario
| Building | Height |
Floors | Built | City | Architect |
|---|---|---|---|---|---|
| St. James Cathedral | 93 | 1874 | Toronto | Cumberland and Ridout | |
| Mackenzie Building Royal Military College of Canada | 1878 | Kingston | Robert Gage | ||
| Temple Building | 40 * | 10 | 1885 | Toronto | George W. Gouinlock |
| Ontario Legislature | 55 | 5 | 1893 | Toronto | Richard A. Waite |
| Old City Hall | 104 | 5 | 1899 | Toronto | E.J. Lennox |
| King Edward Hotel | 72 * | 18 | 1903 | Toronto | E.J. Lennox |
| Trader's Bank Building | 60 * | 15 | 1905 | Toronto | Carrère and Hastings |
| Canadian Pacific Building | 60 * | 15 | 1911 | Toronto | Pearson and Darling |
| 1 King Street West | 48 * | 12 | 1914 | Toronto | Pearson and Darling |
| 36 Toronto Street (Excelsior Life Insurance Company) | 48 * | 12 | 1914 | Toronto | E.J. Lennox |
| Optima Business Centre | 84 * | 21 | 1915 | Toronto | |
| 302 Bay Street | 52 * | 13 | 1917 | Toronto | Curry and Spalding |
| Currie Building Royal Military College of Canada | 1922 | Kingston | |||
| 22 Front Street West (Gowans-Kent Building) | 60 * | 15 | 1923 | Toronto | MacVicar and Heriot |
| 330 Bay Street | 64 * | 16 | 1925 | Toronto | Chapman and Oxley |
| Manulife South Tower | 56 * | 14 | 1926 | Toronto | Henry Sproatt |
| National Building* (demolished Dec. 11, 2006; facades
to be re-erected as part of future Bay Adelaide Centre) |
48 * | 12 | 1926 | Toronto | Chapman and Oxley |
| Queen's Quay Terminal | 43 | 13 | 1926 | Toronto | Moores and Dunford |
| Dominion Building* | 48 * | 12 | 1927 | Toronto | T.W. Fuller |
| Victoria Tower | 84 * | 21 | 1927 | Toronto | |
| 350 Bay Street | 52 * | 13 | 1928 | Toronto | S.B. Coon and Son |
| Canada Building (Windsor) | 70 | 14 | 1928 | Windsor | |
| Concourse Building | 68 | 16 | 1928 | Toronto | Baldwin and Greene |
| Ford Hotel | 48 m* | 12 | 1928 | Toronto | |
| 302 Bay Street | 43 | 13 | 1929 | Toronto | Curry and Spadling |
| Park Hyatt South | 68 * | 17 | 1929 | Toronto | Hugh Holman |
| Pigott Building | 64 | 18 | 1929 | Hamilton | Prack and Prack |
| Prudential House | 64 * | 16 | 1929 | Toronto | Kaplan and Sprachman |
| Royal York Hotel | 124 | 28 | 1929 | Toronto | Ross and Macdonald |
| Sterling Tower | 84 * | 21 | 1929 | Toronto | Chapman and Oxley |
| Tip Top Tailors Building | 48 | 11 | 1929 | Toronto | Bishop and Miller |
| Old Toronto Star Building* | 88 * | 22 | 1929 | Toronto | Chapman and Oxley |
| Balfour Building | 48 | 12 | 1930 | Toronto | Benjamin Brown |
| Canada Permanent Trust Building | 77 | 18 | 1930 | Toronto | Henry Sproatt |
| Commerce Court North Building | 145 | 34 | 1930 | Toronto | Pearson and Darling |
| Merchandise Building | 56 * | 14 | 1930 | Toronto | Burke, Horwood and White |
| Private Patients Pavilion (Bell Wing)* Toronto General Hospital | 40 * | 10 | 1930 | Toronto | Pearson and Darling |
| Victory Building | 80 * | 20 | 1930 | Toronto | Baldwin and Greene |
| Canada Life Building | 87 | 15 | 1931 | Toronto | Sproatt and Rolph |
| Maple Leaf Gardens | 50 | 1931 | Toronto | Ross and Macdonald | |
| Christ the King Cathedral | 52 | 1933 | Hamilton | Hutton and Souter | |
| Whitney Block | 64 * | 16 | 1933 | Toronto | Francis R. Heakes |
| Princess Margaret Hospital | 72 * | 18 | 1935 | Toronto | Henry Sproatt |
| Toronto Western Hospital | 64 * | 16 | 1935 | Toronto |
Read more about this topic: Former Tallest Buildings In Canada By Province And Territory