| 1 | Colonial Park CDP (north-northwest) | 7,628 |
| 2 | Union Deposit CDP | 7,227 |
| 3 | Rutherford CDP | 6,982 |
| 4 | Paxtonia CDP | 6,927 |
| 5 | Unincorporated (east) | 6,650 |
| 6 | Dauphin borough | 6,374 |
| 7 | Unincorporated (south-southeast 2) | 6,312 |
| 8 | Unincorporated (south-southeast 3) | 6,201 |
| 9 | Progress CDP (west-southwest) | 6,161 |
| 10 | Harrisburg city (east 2) | 6,098 |
| 11 | Linglestown CDP (west-northwest) | 6,095 |
| 12 | Unincorporated (east-southeast 1) | 6,067 |
| 13 | Linglestown CDP (east-southeast) | 6,055 |
| 14 | Unincorporated (north-northeast) | 6,001 |
| 15 | Royalton borough | 5,773 |
| 16 | Unincorporated (west 1) | 5,592 |
| 17 | Skyline View CDP (north-northwest) | 5,553 |
| 18 | Colonial Park CDP (west) | 5,520 |
| 19 | Unincorporated (west-northwest 2) | 5,506 |
| 20 | Bressler CDP | 5,451 |
| 21 | Colonial Park CDP (east) | 5,393 |
| 22 | Harrisburg city (east-southeast 1) | 5,347 |
| 23 | Skyline View CDP (south-southeast) | 5,306 |
| 24 | Hershey CDP (south-southwest) | 5,267 |
| 25 | Unincorporated (west-northwest 1) | 5,181 |
| 26 | Hershey CDP (east) | 5,144 |
| 27 | Harrisburg city (southeast) | 4,973 |
| 28 | Steelton borough (northwest) | 4,675 |
| 29 | Hummelstown borough | 4,526 |
| 30 | Harrisburg city (northwest) | 4,387 |
| 31 | Progress CDP (east-southeast) | 4,347 |
| 32 | Colonial Park CDP (south-southeast) | 4,314 |
| 33 | Middletown borough (east-southeast) | 4,258 |
| 34 | Halifax borough | 4,132 |
| 35 | Lenkerville CDP | 4,009 |
| 36 | Gratz borough | 3,868 |
| 37 | Middletown borough (north) | 3,740 |
| 38 | Harrisburg city (east-southeast 2) | 3,713 |
| 39 | Elizabethville borough | 3,618 |
| 40 | Unincorporated (south-southwest 2) | 3,599 |
| 41 | Harrisburg city (south) | 3,551 |
| 42 | Lawnton CDP | 3,519 |
| 43 | Unincorporated (north) | 3,505 |
| 44 | Harrisburg city (north-northwest) | 3,496 |
| 45 | Progress CDP (northwest) | 3,440 |
| 46 | Harrisburg city (west-northwest 1) | 3,430 |
| 47 | Harrisburg city (east-northeast) | 3,366 |
| 48 | Unincorporated (south-southeast 1) | 3,351 |
| 49 | Hershey CDP (north-northwest 1) | 3,336 |
| 50 | Penbrook borough | 3,260 |
| 51 | Unincorporated (east-southeast 2) | 2,979 |
| 52 | Harrisburg city (west-southwest 3) | 2,966 |
| 53 | Harrisburg city (west-northwest 2) | 2,917 |
| 54 | Lykens borough | 2,886 |
| 55 | Palmdale CDP | 2,883 |
| 56 | Highspire borough | 2,729 |
| 57 | Millersburg borough | 2,538 |
| 58 | Williamstown borough | 2,414 |
| 59 | Harrisburg city (east 1) | 2,336 |
| 60 | Harrisburg city (west-southwest 2) | 2,273 |
| 61 | Hershey CDP (north-northwest 2) | 2,161 |
| 62 | Unincorporated (west 2) | 2,149 |
| 63 | Unincorporated (south-southwest 1) | 2,012 |
| 64 | Paxtang borough | 1,617 |
| 65 | Steelton borough (southeast) | 1,592 |
| 66 | Middletown borough (south-southwest) | 1,569 |
| 67 | Harrisburg city (west-southwest 1) | 1,239 |