42 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Erie | 1 | 92,455 | 94,880 | -0.52% | 4,832 | 19 | City |
| Millcreek | 2 | 52,940 | 54,000 | -0.22% | 1,651 | 32 | Township |
| Fairview | 3 | 18,151 | 17,447 | 1.15% | 510 | 36 | Township |
| Harborcreek | 4 | 16,688 | 16,614 | -0.04% | 490 | 34 | Township |
| Fairview | 5 | 11,597 | 11,138 | 1.38% | 402 | 29 | Township |
| Northwest Harborcreek | 6 | 9,080 | 9,321 | 0.09% | 1,815 | 5 | CDP |
| Summit | 7 | 7,269 | 7,353 | -0.18% | 302 | 24 | Township |
| North East | 8 | 6,443 | 6,527 | -0.12% | 153 | 42 | Township |
| Corry | 9 | 6,031 | 6,201 | -0.56% | 1,006 | 6 | City |
| Edinboro | 10 | 6,028 | 4,956 | 3.68% | 2,636 | 2 | Borough |
| Fairview | 11 | 4,804 | 4,697 | 0.63% | 504 | 10 | Township |
| Girard | 12 | 4,790 | 4,866 | -0.21% | 152 | 31 | Township |
| Greene | 13 | 4,432 | 4,482 | -0.14% | 119 | 37 | Township |
| McKean | 14 | 4,362 | 4,430 | -0.14% | 119 | 37 | Township |
| North East | 15 | 4,045 | 4,094 | -0.25% | 3,104 | 1 | Borough |
| Conneaut | 16 | 3,888 | 4,187 | -2.04% | 90 | 43 | Township |
| Waterford | 17 | 3,856 | 3,903 | -0.31% | 77 | 50 | Township |
| Lawrence Park | 18 | 3,777 | 3,780 | -0.37% | 2,056 | 2 | CDP |
| Lawrence Park | 19 | 3,718 | 3,819 | -0.38% | 2,024 | 2 | Township |
| Wesleyville | 20 | 3,114 | 3,219 | -0.67% | 5,875 | 1 | Borough |
| Fairview | 21 | 3,112 | 2,786 | 1.67% | 878 | 4 | CDP |
| Girard | 22 | 2,929 | 2,988 | -0.41% | 1,250 | 2 | Borough |
| Lake City | 23 | 2,849 | 2,931 | -0.59% | 1,585 | 2 | Borough |
| Union City | 24 | 2,840 | 2,924 | -0.6% | 1,552 | 2 | Borough |
| Fairview | 25 | 1,922 | 1,943 | 0.1% | 79 | 24 | Township |
| Elk Creek | 26 | 1,869 | 1,784 | 2.81% | 54 | 35 | Township |
| Greenfield | 27 | 1,795 | 1,802 | 0.22% | 53 | 34 | Township |
| Avonia | 28 | 1,725 | 1,496 | 2.07% | 656 | 3 | CDP |
| LeBoeuf | 29 | 1,636 | 1,656 | -0.18% | 49 | 33 | Township |
| Union | 30 | 1,539 | 1,539 | -0.19% | 42 | 36 | Township |
| Penn State Erie (Behrend) | 31 | 1,521 | 1,596 | -0.52% | 1,945 | 1 | CDP |
| Albion | 32 | 1,489 | 1,522 | -0.47% | 1,381 | 1 | Borough |
| Waterford | 33 | 1,438 | 1,472 | -0.48% | 1,173 | 1 | Borough |
| Fairview | 34 | 926 | 950 | -0.54% | 50 | 19 | Township |
| Cranesville | 35 | 563 | 570 | -0.35% | 602 | 1 | Borough |
| Girard | 36 | 547 | 563 | -0.36% | 9 | 63 | Township |
| McKean | 37 | 477 | 472 | 0.21% | 834 | 1 | Borough |
| Platea | 38 | 432 | 441 | -0.46% | 129 | 3 | Borough |
| Mill Village | 39 | 382 | 392 | -0.52% | 416 | 1 | Borough |
| Wattsburg | 40 | 341 | 351 | -0.58% | 1,144 | 0 | Borough |
| Elgin | 41 | 197 | 204 | -1.01% | 134 | 1 | Borough |
| Fairview | 42 | 189 | 179 | 1.07% | 1,673 | 0 | Borough |
Erie is the largest city in Erie County, with a population of 92,455.
Fairview is the smallest city in Erie County, with a population of 189.
There are 42 cities in Erie County, Pennsylvania.