27 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 16201 | Kittanning | 16,734 |
| 15690 | Vandergrift | 9,359 |
| 16226 | Ford City | 7,994 |
| 16229 | Freeport | 4,900 |
| 16222 | Dayton | 3,139 |
| 16262 | Worthington | 2,811 |
| 15774 | Shelocta | 2,689 |
| 15618 | Avonmore | 2,388 |
| 16259 | Templeton | 2,111 |
| 16028 | East Brady | 2,053 |
| 16249 | Rural Valley | 1,757 |
| 15673 | North Apollo | 1,184 |
| 16218 | Cowansville | 1,138 |
| 15686 | Spring Church | 1,099 |
| 16210 | Adrian | 569 |
| 16238 | Manorville | 446 |
| 16228 | Ford Cliff | 386 |
| 16263 | Yatesboro | 362 |
| 15736 | Elderton | 349 |
| 16244 | Nu Mine | 329 |
| 16245 | Oak Ridge | 262 |
| 16212 | Cadogan | 248 |
| 16250 | Sagamore | 238 |
| 15682 | Schenley | 221 |
| 16236 | McGrann | 215 |
| 16253 | Seminole | 121 |
| 16223 | Distant | 57 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 27 ZCTAs in Armstrong County, Pennsylvania (US Census).