Ontario Cities by Population 2025

5 Most Populated Ontario Cities

Toronto

2,954,524

Ottawa

1,033,266

Brampton

743,369

Mississauga

736,515

Hamilton

568,867

147 cities

City	2025 Pop. ↓	2024 Pop.	2016 Pop.	2011 Pop.	Change
Toronto	2,954,524	2,928,879	2,731,570	2,615,060	0.88%
Ottawa	1,033,266	1,021,765	934,243	883,391	1.13%
Brampton	743,369	725,022	593,638	523,906	2.53%
Mississauga	736,515	734,843	721,599	713,443	0.23%
Hamilton	568,867	565,225	536,917	519,949	0.64%
London	417,807	413,887	383,822	366,151	0.95%
Markham	384,383	377,791	328,966	301,709	1.74%
Vaughan	341,368	337,273	306,233	288,301	1.21%
Kitchener	260,861	257,635	233,222	219,153	1.25%
Windsor	229,000	227,657	217,188	210,891	0.59%
Oakville	215,989	213,407	193,832	182,520	1.21%
Richmond Hill	213,325	211,210	195,022	185,541	1%
Burlington	197,700	196,048	183,314	175,779	0.84%
Oshawa	178,853	176,586	159,458	149,607	1.28%
Milton	177,930	168,694	110,128	84,362	5.48%
Greater Sudbury	163,818	163,563	161,531	160,274	0.16%
Guelph	152,146	149,738	131,794	121,688	1.61%
Barrie	151,642	150,472	141,434	136,063	0.78%
Whitby	140,662	139,241	128,377	122,022	1.02%
Ajax	140,207	137,762	119,677	109,600	1.77%
St. Catharines	136,253	135,900	133,113	131,400	0.26%
Cambridge	135,831	135,161	129,920	126,748	0.5%
Kingston	124,585	124,497	123,798	123,363	0.07%
Waterloo	117,156	115,737	104,986	98,780	1.23%
Clarington	107,150	105,352	92,013	84,548	1.71%
Thunder Bay	107,104	107,193	107,909	108,359	-0.08%
Brantford	104,821	103,981	97,496	93,650	0.81%
Chatham-Kent	98,103	98,490	101,647	103,671	-0.39%
Niagara Falls	97,999	96,842	88,071	82,997	1.19%
Pickering	97,528	96,871	91,771	88,721	0.68%
Newmarket	92,443	91,491	84,224	79,978	1.04%
Peterborough	85,255	84,775	81,032	78,777	0.57%
Caledon	81,345	79,545	66,502	59,460	2.26%
Kawartha Lakes	79,559	79,088	75,423	73,219	0.59%
Sault Ste. Marie	70,281	70,618	73,368	75,141	-0.48%
Sarnia	70,225	70,376	71,594	72,366	-0.21%
Norfolk County	65,638	65,459	64,044	63,175	0.27%
Whitchurch-Stouffville	65,386	62,856	45,837	37,628	4.03%
Halton Hills	65,226	64,762	61,161	59,013	0.72%
Aurora	59,721	59,230	55,445	53,203	0.83%
Welland	55,423	55,066	52,293	50,631	0.65%
Bradford West Gwillimbury	53,407	51,010	35,325	28,077	4.7%
Belleville	53,069	52,803	50,716	49,454	0.51%
Georgina	49,052	48,634	45,418	43,517	0.86%
North Bay	47,981	48,366	51,553	53,651	-0.79%
Woodstock	47,245	46,494	40,902	37,754	1.61%
Cornwall	47,041	46,990	46,589	46,340	0.11%
Haldimand County	46,956	46,804	45,608	44,876	0.32%
Innisfil	44,646	43,667	36,566	32,727	2.24%
Quinte West	44,475	44,374	43,577	43,086	0.23%
New Tecumseth	42,842	41,789	34,242	30,234	2.52%
St. Thomas	40,784	40,571	38,909	37,905	0.52%
Lakeshore	40,644	40,175	36,611	34,546	1.17%
Timmins	39,419	39,676	41,788	43,165	-0.65%
Brant	38,713	38,484	36,707	35,638	0.59%
King	35,675	34,218	24,512	19,899	4.26%
LaSalle	33,157	32,813	30,180	28,643	1.05%
Stratford	32,502	32,386	31,465	30,903	0.36%
Orillia	32,238	32,117	31,166	30,586	0.38%
Fort Erie	32,108	31,949	30,710	29,960	0.5%
Grimsby	31,296	30,826	27,314	25,325	1.52%
Centre Wellington	31,102	30,765	28,191	26,693	1.1%
Orangeville	30,643	30,444	28,900	27,975	0.65%
Woolwich	28,741	28,300	25,006	23,145	1.56%
Wasaga Beach	27,805	26,905	20,675	17,537	3.35%
Collingwood	27,270	26,599	21,793	19,241	2.52%
Clarence-Rockland	27,095	26,795	24,512	23,185	1.12%
East Gwillimbury	26,986	26,636	23,991	22,473	1.32%
Essa	26,662	25,975	21,083	18,505	2.64%
Lincoln	26,319	26,025	23,787	22,487	1.13%
Leamington	26,198	26,350	27,595	28,403	-0.58%
Prince Edward County	23,821	23,921	24,735	25,258	-0.42%
Wilmot	23,158	22,852	20,545	19,223	1.34%
Oro-Medonte	22,877	22,665	21,036	20,078	0.94%
Amherstburg	22,637	22,558	21,936	21,556	0.35%
Tecumseh	22,559	22,632	23,229	23,610	-0.32%
Uxbridge	22,209	22,092	21,176	20,623	0.53%
Niagara-on-the-Lake	22,066	21,507	17,511	15,400	2.6%
Essex	22,005	21,823	20,427	19,600	0.83%
Kingsville	21,898	21,860	21,552	21,362	0.18%
Scugog	21,704	21,694	21,617	21,569	0.04%
Huntsville	21,261	21,096	19,816	19,056	0.79%
Cobourg	21,215	21,010	19,440	18,519	0.98%
Owen Sound	20,730	20,797	21,341	21,688	-0.32%
Strathroy-Caradoc	20,669	20,691	20,867	20,978	-0.11%
Springwater	20,662	20,477	19,059	18,223	0.9%
Thorold	20,475	20,282	18,801	17,931	0.95%
Brockville	20,434	20,534	21,346	21,870	-0.48%
South Frontenac	19,645	19,532	18,646	18,113	0.58%
Petawawa	19,576	19,295	17,187	15,988	1.46%
Hanover	19,346	18,907	15,733	14,026	2.32%
North Grenville	19,229	18,899	16,451	15,085	1.75%
Russell	19,085	18,782	16,520	15,247	1.62%
Middlesex Centre	18,750	18,578	17,262	16,487	0.92%
Loyalist	18,409	18,244	16,971	16,221	0.91%
Port Colborne	18,096	18,119	18,306	18,424	-0.13%
Pelham	18,072	17,962	17,110	16,598	0.61%
Port Hope	17,769	17,653	16,753	16,214	0.66%
Selwyn	17,452	17,408	17,060	16,846	0.25%
Midland	17,403	17,342	16,864	16,572	0.35%
Bracebridge	17,141	17,012	16,010	15,414	0.76%
Tillsonburg	16,954	16,830	15,872	15,301	0.74%
Greater Napanee	16,602	16,521	15,892	15,511	0.49%
Saugeen Shores	15,838	15,587	13,715	12,661	1.61%
West Lincoln	15,774	15,628	14,500	13,837	0.94%
Severn	15,709	15,444	13,477	12,377	1.72%
The Nation	15,148	14,868	12,808	11,668	1.88%
Clearview	14,934	14,845	14,151	13,734	0.6%
West Nipissing	14,759	14,715	14,364	14,149	0.3%
Mississippi Mills	14,689	14,511	13,163	12,385	1.23%
Kenora	14,653	14,701	15,096	15,348	-0.33%
North Perth	14,078	13,970	13,130	12,631	0.78%
South Stormont	14,046	13,939	13,110	12,617	0.77%
Ingersoll	13,935	13,799	12,757	12,146	0.99%
Guelph/Eramosa	13,753	13,650	12,854	12,380	0.75%
Brighton	13,691	13,472	11,844	10,928	1.62%
Thames Centre	13,542	13,502	13,191	13,000	0.29%
Trent Hills	13,450	13,388	12,900	12,604	0.47%
St. Clair	13,345	13,426	14,086	14,515	-0.6%
South Glengarry	13,128	13,131	13,150	13,162	-0.02%
Pembroke	13,061	13,150	13,882	14,360	-0.67%
West Grey	12,947	12,898	12,518	12,286	0.37%
Tiny	12,856	12,733	11,787	11,232	0.97%
Gravenhurst	12,786	12,732	12,311	12,055	0.42%
Erin	12,750	12,597	11,439	10,770	1.21%
Wellington North	12,743	12,648	11,914	11,477	0.75%
Perth East	12,724	12,672	12,261	12,011	0.41%
Central Elgin	12,366	12,392	12,607	12,743	-0.21%
Carleton Place	12,330	12,130	10,644	9,809	1.65%
Wellesley	12,316	12,194	11,260	10,713	1%
Brock	12,204	12,140	11,642	11,341	0.53%
North Dumfries	12,016	11,801	10,215	9,334	1.82%
Kincardine	11,786	11,742	11,389	11,174	0.38%
Adjala-Tosorontio	11,678	11,598	10,975	10,603	0.69%
Mapleton	11,569	11,449	10,527	9,989	1.05%
Norwich	11,524	11,464	11,001	10,721	0.52%
North Dundas	11,374	11,363	11,278	11,225	0.09%
South Dundas	10,904	10,896	10,833	10,794	0.07%
Meaford	10,797	10,819	10,991	11,100	-0.2%
Georgian Bluffs	10,615	10,600	10,479	10,404	0.14%
Tay	10,591	10,527	10,033	9,736	0.6%
Lambton Shores	10,586	10,591	10,631	10,656	-0.05%
Rideau Lakes	10,544	10,519	10,326	10,207	0.23%
South Huron	10,374	10,342	10,096	9,945	0.3%
North Glengarry	9,858	9,886	10,109	10,251	-0.28%
Hawkesbury	9,764	9,818	10,263	10,551	-0.55%
Elliot Lake	9,729	9,837	10,741	11,348	-1.09%

Ontario Cities Overview

The largest city in Ontario is Toronto, with a 2025 population of 2,954,524. Milton is the fastest growing city in Ontario, having grown 5.48% annually between 2011 and 2016.