Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Carroll township | 1 | 5,265 | 5,237 | -0.1% | 154 | 34.3 | Township |
| Newport township | 2 | 4,463 | 4,422 | 0.16% | 277 | 16.1 | Township |
| Wheatfield township | 3 | 3,196 | 3,200 | -0.22% | 154 | 20.8 | Township |
| Marysville | 4 | 2,679 | 2,654 | 0.22% | 1,147 | 2.3 | Borough |
| Saville township | 5 | 2,612 | 2,598 | -0.08% | 57 | 45.9 | Township |
| Centre township | 6 | 2,533 | 2,516 | -0.04% | 84 | 30.0 | Township |
| Spring township | 7 | 2,309 | 2,294 | -0.09% | 81 | 28.6 | Township |
| Rye township | 8 | 2,250 | 2,262 | -0.4% | 87 | 25.7 | Township |
| Juniata township | 9 | 1,538 | 1,531 | -0.13% | 74 | 20.9 | Township |
| Newport | 10 | 1,497 | 1,485 | 0.2% | 4,973 | 0.3 | Borough |
| Duncannon | 11 | 1,449 | 1,471 | -0.41% | 3,560 | 0.4 | Borough |
| Watts township | 12 | 1,246 | 1,234 | 0.08% | 105 | 11.9 | Township |
| Buffalo township | 13 | 1,236 | 1,226 | 0% | 61 | 20.1 | Township |
| Bloomfield | 14 | 1,223 | 1,215 | 0.16% | 2,002 | 0.6 | Borough |
| Liverpool township | 15 | 1,045 | 1,035 | 0.1% | 50 | 20.9 | Township |
| Greenwood township | 16 | 1,042 | 1,033 | 0% | 42 | 25.1 | Township |
| Southwest Madison township | 17 | 1,026 | 1,020 | -0.1% | 38 | 27.4 | Township |
| Liverpool | 18 | 968 | 960 | 0.21% | 1,099 | 0.9 | Borough |
| Millerstown | 19 | 696 | 688 | 0.29% | 824 | 0.8 | Borough |
| Blain | 20 | 228 | 226 | 0% | 717 | 0.3 | Borough |
| Landisburg | 21 | 224 | 220 | 0.45% | 3,155 | 0.1 | Borough |
| New Buffalo | 22 | 125 | 124 | 0% | 2,119 | 0.1 | Borough |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Carroll township is the largest city in Perry County.
New Buffalo is the smallest city in Perry County.
There are 22 cities in Perry County, Pennsylvania.