26 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 17112 | Harrisburg | 38,970 |
| 17111 | Harrisburg | 35,818 |
| 17109 | Harrisburg | 27,422 |
| 17110 | Harrisburg | 26,401 |
| 17057 | Middletown | 23,143 |
| 17036 | Hummelstown | 22,487 |
| 17104 | Harrisburg | 19,401 |
| 17033 | Hershey | 17,009 |
| 17103 | Harrisburg | 12,774 |
| 17113 | Harrisburg | 11,786 |
| 17102 | Harrisburg | 8,177 |
| 17032 | Halifax | 7,630 |
| 17061 | Millersburg | 6,825 |
| 17048 | Lykens | 3,801 |
| 17018 | Dauphin | 3,745 |
| 17023 | Elizabethville | 3,681 |
| 17980 | Tower City | 3,222 |
| 17034 | Highspire | 2,988 |
| 17101 | Harrisburg | 2,678 |
| 17098 | Williamstown | 2,521 |
| 17097 | Wiconisco | 738 |
| 17978 | Spring Glen | 670 |
| 17030 | Gratz | 514 |
| 17005 | Berrysburg | 289 |
| 17080 | Pillow | 248 |
| 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).