35 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Erie | 1 | 91,786 | 94,713 | -0.63% | 4,798 | 19.13 | City |
| Millcreek township | 2 | 52,509 | 54,006 | -0.56% | 1,637 | 32.07 | Township |
| Fairview township | 3 | 17,783 | 17,446 | 0.3% | 500 | 35.58 | Township |
| Harborcreek township | 4 | 16,472 | 16,613 | -0.33% | 483 | 34.09 | Township |
| Fairview township | 5 | 11,444 | 11,139 | 0.77% | 396 | 28.88 | Township |
| Summit township | 6 | 7,227 | 7,351 | -0.32% | 300 | 24.05 | Township |
| Edinboro | 7 | 6,395 | 4,959 | 4.7% | 2,796 | 2.29 | Borough |
| North East township | 8 | 6,387 | 6,520 | -0.4% | 151 | 42.16 | Township |
| Corry | 9 | 5,991 | 6,200 | -0.7% | 999 | 5.99 | City |
| Girard township | 10 | 4,758 | 4,867 | -0.5% | 151 | 31.44 | Township |
| Fairview township | 11 | 4,743 | 4,699 | 0.23% | 498 | 9.53 | Township |
| Greene township | 12 | 4,405 | 4,482 | -0.34% | 118 | 37.38 | Township |
| McKean township | 13 | 4,362 | 4,431 | -0.09% | 119 | 36.80 | Township |
| Conneaut township | 14 | 4,103 | 4,190 | 0.66% | 95 | 43.09 | Township |
| North East | 15 | 4,006 | 4,098 | -0.45% | 3,074 | 1.30 | Borough |
| Waterford township | 16 | 3,840 | 3,903 | -0.49% | 77 | 49.95 | Township |
| Lawrence Park township | 17 | 3,693 | 3,817 | -0.62% | 2,010 | 1.84 | Township |
| Wesleyville | 18 | 3,101 | 3,218 | -0.74% | 5,851 | 0.53 | Borough |
| Girard | 19 | 2,915 | 2,987 | -0.48% | 1,244 | 2.34 | Borough |
| Union City | 20 | 2,825 | 2,927 | -0.7% | 1,544 | 1.83 | Borough |
| Lake City | 21 | 2,820 | 2,930 | -0.77% | 1,569 | 1.80 | Borough |
| Fairview township | 22 | 1,912 | 1,944 | -0.16% | 79 | 24.21 | Township |
| Greenfield township | 23 | 1,776 | 1,800 | -0.17% | 53 | 33.76 | Township |
| Elk Creek township | 24 | 1,753 | 1,783 | -0.28% | 50 | 34.74 | Township |
| LeBoeuf township | 25 | 1,625 | 1,656 | -0.43% | 49 | 33.47 | Township |
| Union township | 26 | 1,545 | 1,540 | 0.07% | 42 | 36.43 | Township |
| Albion | 27 | 1,478 | 1,522 | -0.6% | 1,371 | 1.08 | Borough |
| Waterford | 28 | 1,429 | 1,471 | -0.56% | 1,166 | 1.23 | Borough |
| Cranesville | 29 | 563 | 570 | -0.18% | 602 | 0.94 | Borough |
| McKean | 30 | 481 | 471 | 0.42% | 841 | 0.57 | Borough |
| Platea | 31 | 427 | 441 | -0.7% | 128 | 3.34 | Borough |
| Mill Village | 32 | 381 | 393 | -0.52% | 415 | 0.92 | Borough |
| Wattsburg | 33 | 341 | 355 | -0.87% | 1,144 | 0.30 | Borough |
| Elgin | 34 | 197 | 204 | -0.51% | 134 | 1.47 | Borough |
| Fairview | 35 | 187 | 179 | 1.08% | 1,655 | 0.11 | Borough |
Erie is the largest city in Erie County, with a population of 91,786.
Fairview is the smallest city in Erie County.
There are 35 cities in Erie County, Pennsylvania.