| Zip Code | City | Population ↓ |
|---|---|---|
| 50208 | Newton | 20,595 |
| 50054 | Colfax | 3,166 |
| 50170 | Monroe | 3,024 |
| 50228 | Prairie City | 2,120 |
| 50028 | Baxter | 1,981 |
| 50135 | Kellogg | 1,754 |
| 50251 | Sully | 1,365 |
| 50153 | Lynnville | 890 |
| 50168 | Mingo | 826 |
| 50232 | Reasnor | 569 |
| 50137 | Killduff | 114 |
| 50127 | Ira | 10 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in Jasper County, Iowa (US Census).