Zip Code | City | Population |
|---|---|---|
| 17042 | Lebanon | 39,175 |
| 17046 | Lebanon | 31,818 |
| 17078 | Palmyra | 23,269 |
| 17067 | Myerstown | 16,272 |
| 17003 | Annville | 12,260 |
| 17038 | Jonestown | 8,184 |
| 17073 | Newmanstown | 5,680 |
| 17026 | Fredericksburg | 3,556 |
| 17028 | Grantville | 3,275 |
| 17016 | Cornwall | 1,053 |
| 17064 | Mount Gretna | 916 |
| 17010 | Campbelltown | 450 |
| 17088 | Schaefferstown | 424 |
| 17041 | Lawn | 259 |
| 17077 | Ono | 23 |
| 17039 | Kleinfeltersville | 14 |