| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Sea Right | city | Pennsylvania | United States | 39.955 | -79.805 | 1102 | 11230 |
| Seal | city | Pennsylvania | United States | 39.90306 | -75.59111 | 390 | 33845 |
| Seamentown | city | Pennsylvania | United States | 40.70972 | -78.92944 | 1496 | 3049 |
| Seanor | city | Pennsylvania | United States | 40.21194 | -78.89861 | 1633 | 16244 |
| Searights | city | Pennsylvania | United States | 39.94472 | -79.81389 | 1099 | 11230 |
| Sebastopol | city | Pennsylvania | United States | 41.30694 | -75.8 | 797 | 54512 |
| Sebring | city | Pennsylvania | United States | 41.595 | -77.11028 | 1797 | 951 |
| Secane | city | Pennsylvania | United States | 39.91389 | -75.3025 | 98 | 230714 |
| Sechrist Mill | city | Pennsylvania | United States | 39.86278 | -76.59083 | 649 | 20745 |
| Sedgwick | city | Pennsylvania | United States | 39.79389 | -77.23167 | 498 | 14373 |
| Sedwicks Mill | city | Pennsylvania | United States | 41.16472 | -79.785 | 1305 | 2364 |
| Seeger Place | city | Pennsylvania | United States | 40.69667 | -77.76806 | 994 | 1720 |
| Seelyville | city | Pennsylvania | United States | 41.5775 | -75.28139 | 1200 | 9215 |
| Seemsville | city | Pennsylvania | United States | 40.72222 | -75.45861 | 600 | 23672 |
| Seger | city | Pennsylvania | United States | 40.365 | -79.28556 | 1099 | 7691 |
| Seiberlingville | city | Pennsylvania | United States | 40.60889 | -75.73528 | 784 | 5962 |
| Seidersville | city | Pennsylvania | United States | 40.58778 | -75.385 | 505 | 110417 |
| Seiple | city | Pennsylvania | United States | 40.64278 | -75.51944 | 344 | 96787 |
| Seipstown | city | Pennsylvania | United States | 40.59028 | -75.68 | 685 | 7204 |
| Seisholtzville | city | Pennsylvania | United States | 40.46972 | -75.60444 | 898 | 15762 |
| Seitzland | city | Pennsylvania | United States | 39.78528 | -76.72333 | 725 | 11427 |
| Seitzville | city | Pennsylvania | United States | 39.83 | -76.76222 | 649 | 8139 |
| Seldersville | city | Pennsylvania | United States | 40.50389 | -78.86333 | 1728 | 6167 |
| Selea | city | Pennsylvania | United States | 40.15583 | -77.99194 | 898 | 1748 |
| Selinsgrove | city | Pennsylvania | United States | 40.79889 | -76.8625 | 482 | 14926 |
| Selinsgrove Junction | city | Pennsylvania | United States | 40.80167 | -76.83944 | 600 | 14926 |
| Selkirk | city | Pennsylvania | United States | 41.68722 | -79.58056 | 1299 | 1038 |
| Sellersville | city | Pennsylvania | United States | 40.35389 | -75.30528 | 393 | 40630 |
| Seltzer | city | Pennsylvania | United States | 40.69528 | -76.23417 | 898 | 34027 |
| Seminole | city | Pennsylvania | United States | 40.95472 | -79.34306 | 1410 | 2111 |
| Seneca | city | Pennsylvania | United States | 41.37861 | -79.70417 | 1404 | 13734 |
| Sereno | city | Pennsylvania | United States | 41.15417 | -76.52167 | 718 | 2764 |
| Sergeant | city | Pennsylvania | United States | 41.63389 | -78.75222 | 1755 | 1462 |
| Seven Acres | city | Pennsylvania | United States | 39.9425 | -76.6975 | 639 | 78641 |
| Seven Fields | city | Pennsylvania | United States | 40.69167 | -80.06278 | 1105 | 17634 |
| Seven Pines | city | Pennsylvania | United States | 40.46972 | -77.4625 | 656 | 1524 |
| Seven Points | city | Pennsylvania | United States | 40.82333 | -76.7125 | 692 | 7274 |
| Seven Springs | city | Pennsylvania | United States | 40.02306 | -79.2975 | 2496 | 2088 |
| Seven Stars | city | Pennsylvania | United States | 40.65833 | -78.08194 | 997 | 2404 |
| Seven Stars | city | Pennsylvania | United States | 39.85861 | -77.2975 | 570 | 4457 |
| Seven Stars | city | Pennsylvania | United States | 40.61333 | -77.10528 | 600 | 2764 |
| Seven Stars | city | Pennsylvania | United States | 40.16333 | -75.59472 | 298 | 17670 |
| Seven Stars | city | Pennsylvania | United States | 40.10028 | -75.30111 | 127 | 112164 |
| Seven Valleys | city | Pennsylvania | United States | 39.85556 | -76.76889 | 613 | 12291 |
| Seward | city | Pennsylvania | United States | 40.41417 | -79.02028 | 1295 | 4787 |
| Sewickley | city | Pennsylvania | United States | 40.53639 | -80.18472 | 698 | 40497 |
| Sewickley Heights | city | Pennsylvania | United States | 40.55667 | -80.16333 | 1184 | 31671 |
| Sewickley Hills | city | Pennsylvania | United States | 40.58167 | -80.13694 | 1141 | 31671 |
| Seyfert | city | Pennsylvania | United States | 40.28833 | -75.88389 | 209 | 39955 |
| Seyoc | city | Pennsylvania | United States | 40.29861 | -77.64972 | 1099 | 1260 |
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