| Zip Code | City | Population ↓ |
|---|---|---|
| 54153 | Oconto | 7,551 |
| 54154 | Oconto Falls | 5,741 |
| 54171 | Sobieski | 4,024 |
| 54124 | Gillett | 3,414 |
| 54174 | Suring | 3,171 |
| 54139 | Lena | 3,130 |
| 54101 | Abrams | 2,998 |
| 54141 | Little Suamico | 2,861 |
| 54161 | Pound | 2,595 |
| 54149 | Mountain | 1,210 |
| 54175 | Townsend | 1,101 |
| 54138 | Lakewood | 787 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in Oconto County, Wisconsin (US Census).