List of Ontario census divisions by population List List

| Name_ | _2011_Census | _2006_Census | _change | Land_area_km² | Density_pop_km² | Population_rank |
|---|---|---|---|---|---|---|
| Manitoulin District | 13048 | 12631 | 3.3 | 3107.11 | 4.2 | 49 |
| Middlesex County | 439151 | 422333 | 4.0 | 3317.54 | 132.4 | 10 |
| Muskoka District Municipality | 58047 | 57563 | 0.8 | 3937.76 | 14.7 | 39 |
| Niagara Regional Municipality | 431346 | 427421 | 0.9 | 1854.25 | 232.6 | 11 |
| Nipissing District | 84736 | 84688 | 0.1 | 17103.52 | 5.0 | 31 |
| Northumberland County | 82126 | 80963 | 1.4 | 1905.34 | 43.1 | 32 |
| Ottawa, City of | 883391 | 812129 | 8.8 | 2790.22 | 316.6 | 4 |
| Oxford County | 105719 | 102756 | 2.9 | 2039.56 | 51.8 | 24 |
| Parry Sound District | 42162 | 40918 | 3.0 | 9322.80 | 4.5 | 42 |
| Peel Regional Municipality | 1296814 | 1159455 | 11.8 | 1246.89 | 1040.0 | 2 |
| Perth County | 75112 | 74344 | 1.0 | 2218.46 | 33.9 | 34 |
| Peterborough County | 134933 | 133080 | 1.4 | 3847.77 | 35.1 | 19 |