| 1 | Middletown CDP (east) | 8,787 |
| 2 | Eastlawn Gardens CDP (north-northwest) | 8,212 |
| 3 | Raubsville CDP (south-southeast) | 6,875 |
| 4 | Stockertown borough (east-southeast) | 6,721 |
| 5 | Wilson borough (west-southwest) | 6,656 |
| 6 | Palmer Heights CDP (northeast) | 6,556 |
| 7 | Chestnut Hill CDP (south-southeast) | 6,436 |
| 8 | Cherryville CDP (north) | 6,369 |
| 9 | Wilson borough (east-northeast) | 6,259 |
| 10 | Belfast CDP (north-northeast) | 6,229 |
| 11 | Bath borough (south-southeast) | 5,812 |
| 12 | Chestnut Hill CDP (north-northeast) | 5,606 |
| 13 | Bethlehem city (east-northeast) | 5,510 |
| 14 | Cherryville CDP (southeast) | 5,444 |
| 15 | Chapman borough (south-southeast) | 5,322 |
| 16 | Northampton borough (west-northwest) | 5,303 |
| 17 | Hellertown borough (north-northwest) | 5,268 |
| 18 | Belfast CDP (south-southwest) | 5,248 |
| 19 | Old Orchard CDP (south-southeast) | 5,209 |
| 20 | Ackermanville CDP | 5,158 |
| 21 | Bath borough (west) | 5,118 |
| 22 | East Bangor borough | 5,082 |
| 23 | Northampton borough (east-southeast) | 5,063 |
| 24 | Bethlehem city (south) | 4,761 |
| 25 | Middletown CDP (east-southeast) | 4,761 |
| 26 | Old Orchard CDP (north-northwest) | 4,534 |
| 27 | Hellertown borough (northeast) | 4,495 |
| 28 | Freemansburg borough (west) | 4,454 |
| 29 | Cherryville CDP (west-northwest) | 4,378 |
| 30 | Freemansburg borough (south-southwest) | 4,375 |
| 31 | Chestnut Hill CDP (south) | 4,279 |
| 32 | Freemansburg borough (northeast) | 4,231 |
| 33 | Chapman borough (west-southwest) | 4,202 |
| 34 | Middletown CDP (northwest) | 4,187 |
| 35 | Nazareth borough | 4,080 |
| 36 | Palmer Heights CDP (southwest) | 4,046 |
| 37 | Hellertown borough (southwest) | 3,948 |
| 38 | Middletown CDP (west) | 3,922 |
| 39 | Palmer Heights CDP (east-northeast) | 3,914 |
| 40 | Hellertown borough (west-northwest 1) | 3,912 |
| 41 | Raubsville CDP (south-southwest) | 3,891 |
| 42 | Chestnut Hill CDP (north-northwest) | 3,889 |
| 43 | Bethlehem city (north) | 3,752 |
| 44 | Hellertown borough (east) | 3,715 |
| 45 | Roseto borough | 3,699 |
| 46 | Hellertown borough (west-northwest 2) | 3,673 |
| 47 | Eastlawn Gardens CDP (south-southwest) | 3,638 |
| 48 | Raubsville CDP (north-northeast 2) | 3,510 |
| 49 | Hellertown borough (northwest) | 3,505 |
| 50 | Pen Argyl borough | 3,489 |
| 51 | Bethlehem city (south-southeast) | 3,433 |
| 52 | Eastlawn Gardens CDP (east-southeast) | 3,379 |
| 53 | Chapman borough (northeast) | 3,325 |
| 54 | Mount Bethel CDP | 3,236 |
| 55 | Hellertown borough (south-southeast) | 3,233 |
| 56 | Wind Gap borough | 3,202 |
| 57 | Bethlehem city (west-northwest 2) | 3,162 |
| 58 | Bethlehem city (southeast 2) | 3,097 |
| 59 | Bangor borough | 3,082 |
| 60 | Bethlehem city (southeast 1) | 3,072 |
| 61 | Raubsville CDP (north-northwest) | 3,067 |
| 62 | North Catasauqua borough | 2,968 |
| 63 | Easton city | 2,927 |
| 64 | Martins Creek CDP | 2,911 |
| 65 | Freemansburg borough (southeast) | 2,871 |
| 66 | Bath borough (north) | 2,829 |
| 67 | Bethlehem city (west-northwest 1) | 2,729 |
| 68 | West Easton borough | 2,698 |
| 69 | Raubsville CDP (north-northeast 1) | 2,601 |
| 70 | Hellertown borough (east-southeast) | 2,404 |
| 71 | Stockertown borough (west-southwest) | 2,143 |
| 72 | Stockertown borough (north-northwest) | 2,142 |
| 73 | Walnutport borough | 1,981 |
| 74 | Eastlawn Gardens CDP (north-northeast) | 1,952 |