Ontario Cities by Population (21 to 40)
Search cities in Ontario, Canada. Find out the population, time zones, current local time and more Ontario facts.
| City | Region | Country | Population | |
|---|---|---|---|---|
| Ajax | Ontario | Canada | 119,677 | |
| Guelph | Ontario | Canada | 115,760 | |
| Kingston | Ontario | Canada | 114,195 | |
| Thunder Bay | Ontario | Canada | 107,909 | |
| Waterloo | Ontario | Canada | 104,986 | |
| Pickering | Ontario | Canada | 91,771 | |
| Kanata | Ontario | Canada | 90,000 | |
| Brantford | Ontario | Canada | 87,759 | |
| Newmarket | Ontario | Canada | 84,224 | |
| Niagara Falls | Ontario | Canada | 82,000 | |
| Peterborough | Ontario | Canada | 81,032 | |
| Willowdale | Ontario | Canada | 79,440 | |
| Sarnia | Ontario | Canada | 72,125 | |
| Sault Ste. Marie | Ontario | Canada | 72,051 | |
| Caledon | Ontario | Canada | 66,502 | |
| Waterfront Communities-The Island | Ontario | Canada | 65,913 | |
| Norfolk County | Ontario | Canada | 60,847 | |
| Aurora | Ontario | Canada | 55,445 | |
| Woburn | Ontario | Canada | 53,485 | |
| Welland | Ontario | Canada | 52,293 |