List of municipalities in the Greater Toronto Area
In the Greater Toronto Area, there are 25 incorporated municipalities in either York Region, Halton Region, Peel Region, Durham Region or Toronto. According to the 2016 census, the Greater Toronto Area has a total population of 6,417,516.
| Census subdivision | Population
2006 | Population
2011 | Population
density 2011 | Population
2016 | Population
density 2016 |
| Ajax | 90,167 | 109,600 | 1,634.2 | 119,677 | 1,786.4 |
| Aurora | 47,629 | 53,203 | 1,068.8 | 55,445 | 1,112.3 |
| Brampton | 433,806 | 523,906 | 1,967.1 | 593,638 | 2,228.7 |
| Brock | 11,979 | 11,341 | 26.8 | 11,642 | 27.5 |
| Burlington | 164,415 | 175,779 | 946.8 | 183,314 | 987.3 |
| Caledon | 57,050 | 59,460 | 86.4 | 66,502 | 96.6 |
| Clarington | 77,820 | 84,548 | 138.3 | 92,013 | 150.5 |
| East Gwillimbury | 21,069 | 22,473 | 91.7 | 23,991 | 97.9 |
| Georgina | 42,346 | 43,517 | 151.2 | 45,418 | 157.8 |
| Halton Hills | 55,289 | 59,013 | 213.6 | 61,161 | 221.4 |
| King | 19,487 | 19,899 | 59.7 | 24,512 | 73.6 |
| Markham | 261,573 | 301,709 | 1,419.3 | 328,966 | 1,549.2 |
| Milton | 53,939 | 84,362 | 232.3 | 110,128 | 303.2 |
| Mississauga | 668,549 | 713,443 | 2439.9 | 721,599 | 2,467.6 |
| Newmarket | 74,295 | 79,978 | 2086.3 | 84,224 | 2,190.5 |
| Oakville | 165,613 | 182,520 | 1,314.2 | 193,832 | 1,395.6 |
| Oshawa | 141,590 | 149,607 | 1,027.0 | 159,458 | 1,094.9 |
| Pickering | 87,838 | 88,721 | 383.1 | 91,771 | 396.3 |
| Richmond Hill | 162,704 | 185,541 | 1,838.0 | 195,022 | 1,928.8 |
| Scugog | 21,439 | 21,569 | 45.4 | 21,617 | 45.5 |
| Toronto | 2,503,281 | 2,615,060 | 4,149.5 | 2,731,571 | 4,334.4 |
| Uxbridge | 19,169 | 20,623 | 49.0 | 21,176 | 50.3 |
| Vaughan | 238,866 | 288,301 | 1,054.0 | 306,233 | 1,119.4 |
| Whitby | 111,184 | 122,022 | 832.7 | 128,377 | 875.4 |
| Whitchurch-Stouffville | 24,390 | 37,628 | 182.3 | 45,837 | 222.3 |
Inhabitants per km2
