26 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 17112 | Harrisburg | 38,502 |
| 17111 | Harrisburg | 36,744 |
| 17109 | Harrisburg | 27,466 |
| 17110 | Harrisburg | 27,364 |
| 17057 | Middletown | 23,560 |
| 17036 | Hummelstown | 23,520 |
| 17104 | Harrisburg | 18,541 |
| 17033 | Hershey | 16,481 |
| 17103 | Harrisburg | 13,115 |
| 17113 | Harrisburg | 11,724 |
| 17102 | Harrisburg | 8,118 |
| 17032 | Halifax | 7,551 |
| 17061 | Millersburg | 6,842 |
| 17018 | Dauphin | 3,902 |
| 17048 | Lykens | 3,870 |
| 17023 | Elizabethville | 3,489 |
| 17980 | Tower City | 3,342 |
| 17034 | Highspire | 3,071 |
| 17101 | Harrisburg | 2,722 |
| 17098 | Williamstown | 2,618 |
| 17097 | Wiconisco | 721 |
| 17978 | Spring Glen | 688 |
| 17030 | Gratz | 541 |
| 17005 | Berrysburg | 289 |
| 17080 | Pillow | 264 |
| 17120 | Harrisburg | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 26 ZCTAs in Dauphin County, Pennsylvania (US Census).