| 1 | Elrama CDP (north-northwest) | 7,011 |
| 2 | Wylandville CDP (south) | 6,577 |
| 3 | Thompsonville CDP (east-northeast) | 6,061 |
| 4 | Muse CDP (northwest) | 5,920 |
| 5 | Claysville borough (north-northwest) | 5,575 |
| 6 | Wylandville CDP (west-northwest) | 5,462 |
| 7 | Elrama CDP (south-southeast) | 5,449 |
| 8 | Wylandville CDP (northeast) | 5,394 |
| 9 | Wickerham Manor-Fisher CDP (west) | 5,365 |
| 10 | Cokeburg borough | 5,268 |
| 11 | Midland CDP (east) | 5,174 |
| 12 | Laboratory CDP (east-southeast) | 5,056 |
| 13 | Wolfdale CDP (northwest) | 5,039 |
| 14 | Cecil-Bishop CDP | 5,007 |
| 15 | Green Hills borough (north-northeast) | 4,792 |
| 16 | Thompsonville CDP (west-southwest) | 4,604 |
| 17 | Laboratory CDP (northwest) | 4,575 |
| 18 | Centerville borough (south-southeast) | 4,297 |
| 19 | Joffre CDP | 4,223 |
| 20 | Van Voorhis CDP | 4,084 |
| 21 | Strabane CDP | 3,994 |
| 22 | West Middletown borough | 3,985 |
| 23 | Hendersonville CDP | 3,813 |
| 24 | Muse CDP (southeast) | 3,788 |
| 25 | Midland CDP (east-northeast) | 3,702 |
| 26 | East Marianna CDP (west-northwest) | 3,676 |
| 27 | Paris CDP | 3,580 |
| 28 | Hickory CDP | 3,317 |
| 29 | Gastonville CDP | 3,228 |
| 30 | Wolfdale CDP (south-southwest) | 3,209 |
| 31 | Claysville borough (south-southeast) | 3,109 |
| 32 | Bentleyville borough | 3,072 |
| 33 | Monongahela city (east-southeast) | 2,921 |
| 34 | Green Hills borough (south-southwest) | 2,861 |
| 35 | California borough (west-northwest) | 2,811 |
| 36 | Laboratory CDP (southwest) | 2,708 |
| 37 | Midway borough | 2,685 |
| 38 | Washington city (northeast) | 2,662 |
| 39 | Washington city (west-northwest) | 2,654 |
| 40 | East Marianna CDP (east-southeast) | 2,531 |
| 41 | Charleroi borough (northwest) | 2,476 |
| 42 | Wickerham Manor-Fisher CDP (east) | 2,456 |
| 43 | California borough (east-southeast) | 2,390 |
| 44 | Dunlevy borough | 2,371 |
| 45 | Canonsburg borough | 2,192 |
| 46 | New Eagle borough | 2,148 |
| 47 | Donora borough | 2,080 |
| 48 | Fredericktown CDP | 2,074 |
| 49 | Midland CDP (west-southwest) | 1,879 |
| 50 | Washington city (south-southeast) | 1,864 |
| 51 | Meadowlands CDP | 1,852 |
| 52 | Wolfdale CDP (southeast) | 1,803 |
| 53 | McDonald borough | 1,747 |
| 54 | Charleroi borough (southeast) | 1,727 |
| 55 | Wolfdale CDP (east-northeast) | 1,670 |
| 56 | East Washington borough | 1,658 |
| 57 | Centerville borough (north-northwest) | 1,542 |
| 58 | North Charleroi borough | 1,488 |
| 59 | Burgettstown borough | 1,376 |
| 60 | Long Branch borough | 1,335 |
| 61 | Houston borough | 1,219 |
| 62 | Monongahela city (west-northwest) | 1,192 |