37 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Erie | 1 | 91,970 | 94,880 | -0.52% | 4,807 | 19 | City |
| Millcreek | 2 | 52,821 | 54,000 | -0.22% | 1,647 | 32 | Township |
| Fairview | 3 | 18,358 | 17,447 | 1.14% | 516 | 36 | Township |
| Harborcreek | 4 | 16,681 | 16,614 | -0.04% | 489 | 34 | Township |
| Fairview | 5 | 11,755 | 11,138 | 1.36% | 407 | 29 | Township |
| Summit | 6 | 7,256 | 7,353 | -0.18% | 302 | 24 | Township |
| North East | 7 | 6,435 | 6,527 | -0.12% | 153 | 42 | Township |
| Edinboro | 8 | 6,243 | 4,956 | 3.57% | 2,730 | 2 | Borough |
| Corry | 9 | 5,997 | 6,201 | -0.56% | 1,001 | 6 | City |
| Fairview | 10 | 4,834 | 4,697 | 0.62% | 507 | 10 | Township |
| Girard | 11 | 4,780 | 4,866 | -0.21% | 152 | 31 | Township |
| Greene | 12 | 4,426 | 4,482 | -0.14% | 118 | 37 | Township |
| McKean | 13 | 4,356 | 4,430 | -0.14% | 118 | 37 | Township |
| North East | 14 | 4,035 | 4,094 | -0.25% | 3,097 | 1 | Borough |
| Waterford | 15 | 3,844 | 3,903 | -0.31% | 77 | 50 | Township |
| Conneaut | 16 | 3,807 | 4,187 | -2.08% | 88 | 43 | Township |
| Lawrence Park | 17 | 3,704 | 3,819 | -0.38% | 2,016 | 2 | Township |
| Wesleyville | 18 | 3,093 | 3,219 | -0.67% | 5,836 | 1 | Borough |
| Girard | 19 | 2,917 | 2,988 | -0.41% | 1,244 | 2 | Borough |
| Lake City | 20 | 2,833 | 2,931 | -0.56% | 1,577 | 2 | Borough |
| Union City | 21 | 2,823 | 2,924 | -0.6% | 1,543 | 2 | Borough |
| Fairview | 22 | 1,924 | 1,943 | 0.1% | 79 | 24 | Township |
| Elk Creek | 23 | 1,920 | 1,784 | 2.73% | 55 | 35 | Township |
| Greenfield | 24 | 1,799 | 1,802 | 0.22% | 53 | 34 | Township |
| LeBoeuf | 25 | 1,633 | 1,656 | -0.18% | 49 | 33 | Township |
| Union | 26 | 1,536 | 1,539 | -0.19% | 42 | 36 | Township |
| Albion | 27 | 1,483 | 1,522 | -0.4% | 1,376 | 1 | Borough |
| Waterford | 28 | 1,431 | 1,472 | -0.49% | 1,167 | 1 | Borough |
| Fairview | 29 | 921 | 950 | -0.54% | 50 | 19 | Township |
| Cranesville | 30 | 562 | 570 | -0.18% | 601 | 1 | Borough |
| Girard | 31 | 545 | 563 | -0.37% | 9 | 63 | Township |
| McKean | 32 | 478 | 472 | 0.21% | 836 | 1 | Borough |
| Platea | 33 | 430 | 441 | -0.46% | 129 | 3 | Borough |
| Mill Village | 34 | 380 | 392 | -0.52% | 413 | 1 | Borough |
| Wattsburg | 35 | 339 | 351 | -0.59% | 1,138 | 0 | Borough |
| Elgin | 36 | 196 | 204 | -0.51% | 133 | 1 | Borough |
| Fairview | 37 | 191 | 179 | 1.06% | 1,690 | 0 | Borough |
Erie is the largest city in Erie County, with a population of 91,970.
Fairview is the smallest city in Erie County, with a population of 191.
There are 37 cities in Erie County, Pennsylvania.