Great Lakes Megalopolis Population centers Population centers

| Area | State_Province | CSA_CMA_2009_population | Projected_2025_population | Projected_increase_2009_2025 |
|---|---|---|---|---|
| Chicago | IL-IN-WI | 9804845 | 10746109 | 941264 |
| Toronto | ON | 5741400 | 7787000 | 2045600 |
| Detroit | MI | 5318744 | 5199608 | -119136 |
| Montreal [ dubious – discuss ] | QC | 3859300 | 4246931 | 387631 |
| Minneapolis – Saint Paul | MN-WI | 3604460 | 4031000 | 426540 |
| St. Louis | MO-IL | 2892874 | 3049000 | 156126 |
| Cleveland — Akron | OH | 2891988 | 3172000 | 280012 |
| Pittsburgh | PA | 2445117 | 2868818 | 367299 |
| Cincinnati | OH-KY-IN | 2214954 | 2448000 | 233046 |
| Indianapolis | IN | 1928982 | 2270112 | 341130 |
| Kansas City | MO-KS | 2038724 | 2293564 | 254840 |
| Columbus | OH | 2031229 | 2446450 | 415221 |
| Milwaukee | WI | 2025898 | 2129949 | 103706 |
| Ottawa – Gatineau | ON-QC | 1451415 | 1596556 | 145141 |
| Louisville | KY-IN | 1395634 | 1602456 | 206822 |
| Grand Rapids | MI | 1327366 | 1530000 | 202634 |
| Buffalo | NY | 1203493 | 1040400 | -163093 |