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Cities
Cities in Ontario - Best Places to Visit
There are 144 cities in Ontario.
Toronto
is the most popular city with a population of 2,794,356.
Most Popular
By Name
By Population
1
Toronto
Largest city in Canada with diverse population
Pop. 2,794,356
2
Niagara Falls, Ontario
City in Ontario, famous for its waterfalls
Pop. 99,818
3
Ottawa
Capital city of Canada
Pop. 1,017,449
4
Hamilton, Ontario
Industrial city in Ontario with diverse economy
Pop. 569,353
5
London, Ontario
City in Ontario, Canada, near Lake Erie
Pop. 422,324
6
Mississauga
City in Ontario known for its multiculturalism
Pop. 717,961
7
Windsor, Ontario
City in Ontario known for its waterfront
Pop. 229,660
8
Kingston, Ontario
City on the St. Lawrence River with historic sites
Pop. 132,485
9
Brampton
City in Ontario, part of Greater Toronto
Pop. 656,480
10
Kitchener, Ontario
Ontario city known for technology and innovation
Pop. 256,885
11
Thunder Bay
City in Ontario, Canada, near Lake Superior
Pop. 108,843
12
Oshawa
Canadian city located in Ontario province
Pop. 175,383
13
Greater Sudbury
City in Ontario, Canada
Pop. 166,004
14
Barrie
Ontario city on Lake Simcoe, Toronto commuter town
Pop. 147,829
15
Guelph
City in Ontario known for its university
Pop. 143,740
16
St. Catharines
City in Ontario, known for its wine region
Pop. 136,803
17
Brantford
City in Ontario, Canada
Pop. 104,688
18
Markham, Ontario
City in Ontario, Canada
Pop. 338,503
19
Sault Ste. Marie, Ontario
City in Ontario located near the Great Lakes
Pop. 72,051
20
Vaughan
City in Ontario, known for Vaughan Mills mall
Pop. 323,103
21
Burlington, Ontario
City in Ontario, Canada, near Lake Ontario
Pop. 186,948
22
Sarnia
City in Ontario with a rich industrial history
Pop. 72,125
23
Belleville, Ontario
City in Ontario with vibrant community
Pop. 50,716
24
Waterloo, Ontario
City in Ontario, Canada
Pop. 104,986
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