There are 34 cities in Mercer County, Pennsylvania.
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 | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Hermitage | 1 | Pennsylvania | 15,816 | 16,243 | -0.67% | 537 | 29.46 |
| Sharon | 2 | Pennsylvania | 12,707 | 13,129 | -0.83% | 3,369 | 3.77 |
| Grove City | 3 | Pennsylvania | 7,747 | 7,875 | -0.41% | 2,874 | 2.70 |
| Greenville | 4 | Pennsylvania | 5,467 | 5,534 | -0.31% | 2,897 | 1.89 |
| Farrell | 5 | Pennsylvania | 4,129 | 4,253 | -0.74% | 1,824 | 2.26 |
| Sharpsville | 6 | Pennsylvania | 4,113 | 4,248 | -0.82% | 2,957 | 1.39 |
| Slippery Rock | 7 | Pennsylvania | 3,716 | 3,168 | 3.83% | 2,259 | 1.65 |
| Slippery Rock University | 8 | Pennsylvania | 2,861 | 2,503 | 3.25% | 5,192 | 0.55 |
| Pymatuning Central | 9 | Pennsylvania | 2,397 | 2,253 | 1.52% | 146 | 16.37 |
| New Wilmington | 10 | Pennsylvania | 2,097 | 2,097 | 0% | 1,990 | 1.05 |
| Reynolds Heights | 11 | Pennsylvania | 2,013 | 1,941 | 0.9% | 693 | 2.90 |
| Mercer | 12 | Pennsylvania | 1,916 | 1,982 | -0.88% | 1,656 | 1.16 |
| Cochranton | 13 | Pennsylvania | 1,092 | 1,118 | -0.64% | 909 | 1.20 |
| Stoneboro | 14 | Pennsylvania | 925 | 948 | -0.64% | 326 | 2.83 |
| West Middlesex | 15 | Pennsylvania | 787 | 815 | -0.88% | 931 | 0.84 |
| New Bedford | 16 | Pennsylvania | 697 | 1,053 | -11.32% | 273 | 2.55 |
| Lake Latonka | 17 | Pennsylvania | 694 | 756 | -2.12% | 347 | 2 |
| Sandy Lake | 18 | Pennsylvania | 628 | 648 | -0.79% | 755 | 0.83 |
| Polk | 19 | Pennsylvania | 619 | 633 | -0.64% | 305 | 2.03 |
| Jamestown | 20 | Pennsylvania | 566 | 581 | -0.7% | 679 | 0.83 |
| Wheatland | 21 | Pennsylvania | 564 | 582 | -0.88% | 646 | 0.87 |
| Clark | 22 | Pennsylvania | 557 | 575 | -0.89% | 185 | 3.01 |
| Pymatuning South | 23 | Pennsylvania | 448 | 361 | 1.82% | 173 | 2.59 |
| Fredonia | 24 | Pennsylvania | 422 | 434 | -0.71% | 1,182 | 0.36 |
| West Liberty | 25 | Pennsylvania | 319 | 333 | -1.24% | 83 | 3.84 |
| Frizzleburg | 26 | Pennsylvania | 260 | 340 | -7.14% | 92 | 2.82 |
| Jackson Center | 27 | Pennsylvania | 185 | 192 | -1.07% | 163 | 1.14 |
| New Lebanon | 28 | Pennsylvania | 185 | 185 | 0% | 145 | 1.27 |
| Barkeyville | 29 | Pennsylvania | 183 | 190 | -1.08% | 55 | 3.32 |
| Utica | 30 | Pennsylvania | 181 | 187 | -1.09% | 129 | 1.40 |
| Sheakleyville | 31 | Pennsylvania | 144 | 150 | -1.37% | 735 | 0.20 |
| Volant | 32 | Pennsylvania | 120 | 127 | -1.64% | 1,071 | 0.11 |
| Adamsville | 33 | Pennsylvania | 77 | 74 | -3.75% | 195 | 0.39 |
| Hannasville | 34 | Pennsylvania | 75 | 151 | -20.21% | 48 | 1.55 |
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.
Hermitage is the largest city in Mercer County.
Hannasville is the smallest city in Mercer County.
There are 34 cities in Mercer County, Pennsylvania.