| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Claghorn | city | Pennsylvania | United States | 40.48778 | -79.07528 | 1358 | 3143 |
| Clairton | city | Pennsylvania | United States | 40.29222 | -79.88194 | 813 | 69805 |
| Clapp Lease | city | Pennsylvania | United States | 41.39917 | -79.52917 | 1499 | 1938 |
| Clappertown | city | Pennsylvania | United States | 40.40306 | -78.27556 | 1194 | 4493 |
| Clappville | city | Pennsylvania | United States | 41.69639 | -79.79472 | 1249 | 1681 |
| Clara | city | Pennsylvania | United States | 41.89278 | -78.10278 | 1843 | 910 |
| Clarence | city | Pennsylvania | United States | 41.04806 | -77.94056 | 1473 | 840 |
| Clarendon | city | Pennsylvania | United States | 41.78 | -79.09333 | 1486 | 2327 |
| Clarendon Heights | city | Pennsylvania | United States | 41.79139 | -79.10556 | 1446 | 2327 |
| Claridge | city | Pennsylvania | United States | 40.36556 | -79.6225 | 1118 | 36959 |
| Clarington | city | Pennsylvania | United States | 41.3325 | -79.12333 | 1200 | 1161 |
| Clarion | city | Pennsylvania | United States | 41.21472 | -79.38556 | 1430 | 8570 |
| Clarion Junction | city | Pennsylvania | United States | 41.23694 | -79.41722 | 1397 | 7122 |
| Clark | city | Pennsylvania | United States | 41.28611 | -80.42778 | 971 | 23256 |
| Clarks Green | city | Pennsylvania | United States | 41.49278 | -75.7 | 1197 | 44730 |
| Clarks Mills | city | Pennsylvania | United States | 41.39306 | -80.18389 | 1164 | 2437 |
| Clarks Summit | city | Pennsylvania | United States | 41.48861 | -75.70889 | 1309 | 22675 |
| Clarks View | city | Pennsylvania | United States | 41.22083 | -76.28667 | 898 | 1972 |
| Clarksburg | city | Pennsylvania | United States | 40.53361 | -79.38222 | 997 | 3567 |
| Clarkstown | city | Pennsylvania | United States | 41.19861 | -76.72583 | 593 | 5795 |
| Clarksville | city | Pennsylvania | United States | 39.97278 | -80.04417 | 997 | 5931 |
| Clarksville Hill | city | Pennsylvania | United States | 39.98222 | -80.03917 | 997 | 8293 |
| Claussville | city | Pennsylvania | United States | 40.61417 | -75.65417 | 600 | 12200 |
| Clay | city | Pennsylvania | United States | 40.21833 | -76.25583 | 400 | 12110 |
| Clay Hill | city | Pennsylvania | United States | 39.81972 | -77.675 | 751 | 9539 |
| Clay Ridge | city | Pennsylvania | United States | 40.5025 | -75.11583 | 498 | 7303 |
| Clayford | city | Pennsylvania | United States | 39.89472 | -79.77528 | 1197 | 28495 |
| Claylick | city | Pennsylvania | United States | 39.76667 | -77.89389 | 561 | 2648 |
| Claypoole Heights | city | Pennsylvania | United States | 40.62139 | -79.19306 | 1299 | 26543 |
| Claysburg | city | Pennsylvania | United States | 40.29667 | -78.45 | 1299 | 6976 |
| Claysville | city | Pennsylvania | United States | 40.11778 | -80.41056 | 1197 | 3324 |
| Clayton | city | Pennsylvania | United States | 40.41806 | -75.57389 | 498 | 13375 |
| Claytonia | city | Pennsylvania | United States | 41.00972 | -79.96722 | 1302 | 3964 |
| Clear Ridge | city | Pennsylvania | United States | 39.96944 | -78.3675 | 1318 | 4378 |
| Clear Ridge | city | Pennsylvania | United States | 40.08917 | -77.99528 | 967 | 1435 |
| Clear Run | city | Pennsylvania | United States | 41.1375 | -78.755 | 1456 | 13947 |
| Clear Spring | city | Pennsylvania | United States | 40.05861 | -77.06306 | 577 | 9293 |
| Clear Spring | city | Pennsylvania | United States | 40.33306 | -76.54833 | 400 | 21864 |
| Clear Springs | city | Pennsylvania | United States | 40.00417 | -76.73611 | 449 | 53534 |
| Clear View | city | Pennsylvania | United States | 40.00639 | -76.69361 | 728 | 45827 |
| Clearfield | city | Pennsylvania | United States | 41.02722 | -78.43944 | 1115 | 11554 |
| Clearfield | city | Pennsylvania | United States | 40.80083 | -75.34722 | 698 | 11856 |
| Clearfield Junction | city | Pennsylvania | United States | 41.00111 | -78.3975 | 1197 | 9904 |
| Clearview | city | Pennsylvania | United States | 40.0625 | -76.30167 | 324 | 111957 |
| Clearview Heights | city | Pennsylvania | United States | 39.90528 | -76.67167 | 787 | 44294 |
| Clearview Manor | city | Pennsylvania | United States | 40.275 | -76.78833 | 498 | 55281 |
| Clearville | city | Pennsylvania | United States | 39.91667 | -78.38417 | 1400 | 2305 |
| Clemo | city | Pennsylvania | United States | 41.50389 | -75.32444 | 1492 | 5768 |
| Cleona | city | Pennsylvania | United States | 40.33722 | -76.47583 | 498 | 35297 |
| Clermont | city | Pennsylvania | United States | 41.68944 | -78.48861 | 2083 | 803 |
| Cleversburg | city | Pennsylvania | United States | 40.0375 | -77.46639 | 944 | 8923 |
| Cleversburg Junction | city | Pennsylvania | United States | 40.05028 | -77.465 | 797 | 10393 |
| Clifford | city | Pennsylvania | United States | 41.64889 | -75.59917 | 1108 | 4070 |
| Cliffs historical | city | Pennsylvania | United States | 40.01917 | -78.47861 | 1095 | 5522 |
| Clifton | city | Pennsylvania | United States | 40.33111 | -80.06833 | 1043 | 90254 |
| Clifton | city | Pennsylvania | United States | 40.22889 | -76.72444 | 308 | 35902 |
| Clifton | city | Pennsylvania | United States | 41.22278 | -75.54806 | 1692 | 3161 |
| Clifton Heights | city | Pennsylvania | United States | 39.92917 | -75.29667 | 114 | 287838 |
| Climax | city | Pennsylvania | United States | 40.98417 | -79.37639 | 1105 | 2146 |
| Climax | city | Pennsylvania | United States | 40.38528 | -79.12444 | 1177 | 2902 |
| Clinton | city | Pennsylvania | United States | 40.48944 | -80.29472 | 1197 | 6524 |
| Clinton | city | Pennsylvania | United States | 40.72417 | -79.78583 | 1197 | 9624 |
| Clinton | city | Pennsylvania | United States | 40.70639 | -79.58667 | 830 | 9460 |
| Clinton | city | Pennsylvania | United States | 40.04917 | -79.46333 | 1994 | 5529 |
| Clintondale | city | Pennsylvania | United States | 41.01722 | -77.52111 | 823 | 2362 |
| Clintonville | city | Pennsylvania | United States | 41.19917 | -79.87306 | 1397 | 1706 |
| Cloe | city | Pennsylvania | United States | 40.93694 | -78.93278 | 1295 | 10320 |
| Clokeyville historical | city | Pennsylvania | United States | 40.18111 | -80.13778 | 1000 | 9290 |
| Clonmell | city | Pennsylvania | United States | 39.88222 | -75.82639 | 498 | 7823 |
| Clover | city | Pennsylvania | United States | 41.05889 | -80.35889 | 1174 | 25861 |
| Clover Creek | city | Pennsylvania | United States | 40.30639 | -78.27944 | 1302 | 3772 |
| Clover Hill | city | Pennsylvania | United States | 40.08583 | -79.97917 | 1190 | 10950 |
| Clover Run | city | Pennsylvania | United States | 40.93389 | -78.78028 | 1919 | 1252 |
| Cloverly Acres | city | Pennsylvania | United States | 40.55278 | -76.93583 | 505 | 7014 |
| Club Estates | city | Pennsylvania | United States | 40.33 | -76.84583 | 442 | 90628 |
| Cly | city | Pennsylvania | United States | 40.12389 | -76.73667 | 314 | 15397 |
| Clyde | city | Pennsylvania | United States | 40.44972 | -79.07028 | 1699 | 3287 |
| Clyde | city | Pennsylvania | United States | 40.70806 | -75.39528 | 400 | 51705 |
| Clymer | city | Pennsylvania | United States | 40.66806 | -79.01194 | 1584 | 3675 |
| Clymer | city | Pennsylvania | United States | 41.85667 | -77.59861 | 2125 | 1008 |
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