26 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 17112 | Harrisburg | 38,369 |
| 17111 | Harrisburg | 36,269 |
| 17109 | Harrisburg | 26,531 |
| 17110 | Harrisburg | 25,456 |
| 17057 | Middletown | 23,423 |
| 17036 | Hummelstown | 22,317 |
| 17104 | Harrisburg | 20,211 |
| 17033 | Hershey | 17,023 |
| 17103 | Harrisburg | 12,923 |
| 17113 | Harrisburg | 11,559 |
| 17102 | Harrisburg | 8,173 |
| 17032 | Halifax | 7,645 |
| 17061 | Millersburg | 6,924 |
| 17018 | Dauphin | 4,158 |
| 17048 | Lykens | 3,611 |
| 17023 | Elizabethville | 3,496 |
| 17980 | Tower City | 3,039 |
| 17034 | Highspire | 2,709 |
| 17101 | Harrisburg | 2,513 |
| 17098 | Williamstown | 2,441 |
| 17097 | Wiconisco | 772 |
| 17978 | Spring Glen | 739 |
| 17030 | Gratz | 587 |
| 17080 | Pillow | 306 |
| 17005 | Berrysburg | 280 |
| 17120 | Harrisburg | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 26 ZCTAs in Dauphin County, Pennsylvania (US Census).