List of tallest buildings in Ontario facts for kids

This list of tallest buildings in Ontario ranks skyscrapers and high rise buildings in the province of Ontario by height. Buildings in seven cities are included in this list; Toronto, Mississauga, Niagara Falls, Hamilton, London, Ottawa and Windsor, each having buildings taller than 110 metres.

The tallest building in the province of Ontario is First Canadian Place 298 metres (978 feet). Completed in 1976, it is also the tallest building in Canada and the 68th tallest building in the world. At the time of its completion, it was the tallest building in the world outside of Chicago and New York City.

All of the buildings taller than 150 metres are in Toronto, Mississauga and Niagara Falls, all three cities being part of the Golden Horseshoe. The tallest building in Ottawa, Ontario's second largest city, rises to only 112.4 metres due to height restrictions put in place as to prevent any building from exceeding the height of the Peace Tower of parliament hill in Downtown Ottawa.

Buildings over 100 meters

Toronto, the largest city in both Ontario and Canada.

Ottawa's metropolitan area is the second largest in Ontario, with 1.3 million people.

Niagara Falls has the third tallest skyline in Ontario, after Toronto and Mississauga.

Hamilton is one of Ontario's most populous cities with a metropolitan population over 700 000 people.

London is the third largest continuous urban area in Ontario with a population of 500 000.

Windsor, Ontario is the most southern metropolis in Canada with a population of 330 000.

This list ranks buildings in Ontario that stand between least 100 m (328 ft) tall, based on CTBUH height measurement standards. This includes spires and architectural details but does not include antenna masts. An equal sign (=) following a rank indicates the same height between two or more buildings. Freestanding observation and/or telecommunication towers, while not habitable buildings, are included for comparison purposes; however, they are not ranked. One such tower is the CN Tower.

Rank	Name	Image	Height m / ft	Floors	Year	City	Notes	Ref
N/A	CN Tower		553 / 1,815	-147	1976	Toronto	Third-tallest free-standing structure on land in the world Tallest free-standing structure in the Western Hemisphere since 1975 Tallest free-standing structure on land in the world from 1975 to 2007 Contains no immediate floors but has the height of 147 storeys
1	First Canadian Place		298 / 978	72	1976	Toronto	Tallest building in Canada since 1976 6th tallest building in the world at the time of its completion Tallest building in the world outside of Chicago and New York City at the time of its completion Tallest building completed in Ontario in the 1970s. Formerly known as First Bank Tower
2	The St. Regis Toronto		277 / 908	59	2011	Toronto	Tallest mixed-use building in Canada. Second-tallest building in Canada by standard height. Tallest building completed in Ontario in the 2010s.
3	Scotia Plaza		275 / 902	68	1988	Toronto	Tallest building completed in Ontario in the 1980s.
4	Brookfield Place		261 / 856	53	1990	Toronto	Tallest building completed in Ontario in the 1990s.
5	Commerce Court West		239 / 784	57	1972	Toronto
6	Toronto-Dominion Tower		223 / 731	56	1967	Toronto	Tallest building completed in Ontario in the 1960s.
7	Bay Adelaide Centre West Tower		218 / 715	51	2009	Toronto	Tallest building completed in Ontario in the 2000s.
8	Ritz-Carlton Toronto		208 / 684	53	2011	Toronto
9	Bay Wellington Tower		207 / 679	49	1991	Toronto
10	Four Seasons Hotel and Residences West		205 / 650	55	2011	Toronto
11	88 Scott		204 / 669	58	2018	Toronto
12	Maple Leaf Square North Tower		186 / 610	54	2010	Toronto
13=	Royal Trust Tower		183 / 600	46	1969	Toronto
13=	RBC Centre		183 / 600	42	2009	Toronto
15=	Royal Bank Plaza South		180 / 591	40	1979	Toronto
15=	Absolute World South		180 / 589	56	2011	Mississauga	Tallest building in Ontario outside of the city of Toronto. Tallest skyscraper in any suburban city in all of North America.
16	Hilton Niagara Falls Tower 2		177 / 580	58	2009	Niagara Falls	Tallest building in Ontario outside of the Greater Toronto Area. Tallest hotel in Canada.
17	One King Street West		176 / 578	51	2005	Toronto	Tallest completed all-residential skyscraper in Toronto.
18	Maple Leaf Square South Tower		174 / 571	50	2010	Toronto
19	44 Charles Street West		166 / 545	51	1972	Toronto	25th-tallest building in Canada.
20	Quantum 2		165 / 541	51	2008	Toronto
21	Residences of College Park		163 / 535	51	2006	Toronto
22	Success Tower		162 / 531	54	2009	Toronto
23	Absolute World North		161.2 / 529	50	2012	Mississauga
N/A	Skylon Tower		158.5 / 520	-	1965	Niagara Falls	Tallest freestanding structure in Ontario when completed in 1965. Overtaken by the Toronto-Dominion Centre in 1967.
24	The Uptown Residences		158 / 518	48	2011	Toronto
25	Festival Tower		157 / 514	42	2010	Toronto
26	TD Waterhouse Tower		154 / 504	39	1985	Toronto
27	35 Mariner		153 / 503	49	2005	Toronto
28	Montage		153 / 502	48	2009	Toronto
29	The 250		151 / 494	35	1992	Toronto	Atop the Toronto Eaton Centre
30=	Two Bloor West		149 / 488	34	1973	Toronto
30=	X Condominium		149 / 488	45	2010	Toronto
32=	West One		148 / 486	49	2007	Toronto
32=	Simcoe Place		148 / 486	33	1995	Toronto
34	Residences of College Park South		147 / 482	45	2008	Toronto
35	Exchange Tower		146 / 479	30	1983	Toronto
36	Commerce Court North		145 / 476	34	1931	Toronto	Tallest building completed in Ontario in the 1930s Tallest building in Canada from 1930 to 1962
37	Simpson Tower		144 / 472	33	1968	Toronto
38=	Claridge Icon		143 / 469	45	2020 (Topped-out)	Ottawa	Tallest building in Ontario outside of the Golden Horseshoe.
38=	SP!RE		143 / 469	43	2007	Toronto
40=	Cadillac Fairview Tower		142 / 466	36	1981	Toronto
40=	One Park Tower		142 / 466	38	2008	Mississauga
42	Murano South		140 / 459	41	2009	Toronto
43	Pantages Tower		140 / 458	46	2003	Toronto
44	The Met Condos		139 / 456	43	2007	Toronto
45=	CASA		138 / 453	45	2009	Toronto
45=	Palace Place		138 / 453	46	1991	Toronto
45=	Palace Pier		138 / 453	46	1978	Toronto
48	Oxford Tower		137 / 449	33	1979	Toronto
49	Sheraton Centre Hotel		135 / 443	43	1972	Toronto	Tallest all-hotel building in Toronto.
50	Two Bloor East		134 / 439	34	1974	Toronto
51	Ernst & Young Tower		133 / 437	31	1991	Toronto
52	N1/N2		133 / 436	41	2007	Toronto
53	Empire Tower		130 / 427	28	2005	Toronto
54	Dundee Place		129 / 424	31	1991	Toronto
55=	Leaside Towers I		129 / 423	44	1970	Toronto
55=	Leaside Towers II		129 / 423	44	1970	Toronto
57=	Canadian Pacific Tower		128 / 420	32	1974	Toronto
57=	Metro Hall West		128 / 420	27	1992	Toronto
59=	Landmark Place		127 / 417	43	1974	Hamilton	Tallest building in Hamilton.
59=	Pinnacle A		127 / 417	40	2006	Toronto
59=	18 Yonge		127 / 417	39	2006	Toronto
59=	Westin Harbour Castle South Tower		127 / 417	38	1975	Toronto
63	Marriott Hotel/Plaza 2 Apartments		126 / 415	41	1975	Toronto
64=	Verve		126 / 413	39	2008	Toronto
64=	Quantum		126 / 413	37	2007	Toronto
64=	Crystal Blu		126 / 413	34	2010	Toronto
67	Chicago		125 / 410	35	2010	Mississauga
68	Sun Life Centre East Tower		125 / 410	28	1984	Toronto
69	Yonge Eglinton Centre I		124 / 408	30	1974	Toronto
70	Royal York Hotel		124 / 407	28	1929	Toronto
71	10 Navy		123 / 402	40	2005	Toronto
72	Solstice		121 / 397	37	2008	Mississauga
73	Embassy Suites Hotel Niagara Falls		118 / 387	42	2003	Niagara Falls
74	One London Place		113.4 / 372	24	1992	London	Tallest building in London.
75	The Park Mansion		112.4 / 369	36	1990	Mississauga
76=	Place de Ville C		112 / 367	29	1972	Ottawa
76=	Absolute Vision		112 / 367	35	2009	Mississauga
78	Caesars Windsor Augustus Tower		111 / 364	27	2008	Windsor	Tallest building in Windsor.
79	Minto Metropole		109 / 354	32	2004	Ottawa
80	20/22 George St.		106 / 348	32	2019	Hamilton
81	100 King Street West		103 / 338	25	1973	Hamilton
82=	World on Yonge Condos - North Tower		102 / 335	32	2014	Markham	Tallest buildings in Markham.
82=	World on Yonge Condos - South Tower		102 / 335	32	2014	Markham	Tallest buildings in Markham.