27 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 16201 | Kittanning | 17,040 |
| 15690 | Vandergrift | 8,985 |
| 16226 | Ford City | 7,689 |
| 16229 | Freeport | 4,798 |
| 16222 | Dayton | 3,306 |
| 16262 | Worthington | 2,772 |
| 15774 | Shelocta | 2,602 |
| 15618 | Avonmore | 2,386 |
| 16028 | East Brady | 1,981 |
| 16259 | Templeton | 1,911 |
| 16249 | Rural Valley | 1,791 |
| 15673 | North Apollo | 1,156 |
| 15686 | Spring Church | 1,102 |
| 16218 | Cowansville | 1,000 |
| 16210 | Adrian | 574 |
| 16228 | Ford Cliff | 409 |
| 16236 | McGrann | 405 |
| 16238 | Manorville | 402 |
| 15736 | Elderton | 386 |
| 16244 | Nu Mine | 342 |
| 16212 | Cadogan | 261 |
| 16263 | Yatesboro | 259 |
| 16250 | Sagamore | 240 |
| 15682 | Schenley | 234 |
| 16245 | Oak Ridge | 196 |
| 16253 | Seminole | 87 |
| 16223 | Distant | 65 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 27 ZCTAs in Armstrong County, Pennsylvania (US Census).