| Locality | Post Code |
|---|---|
| Blackhawk Village, Black Hawk | 50613 |
| Brookside, Black Hawk | 50613 |
| Buckingham, Black Hawk | 50612 |
| Cedar City, Black Hawk | 50613 |
| Cedar Falls, Black Hawk | 50613, 50614 |
| College Square, Black Hawk | 50613 |
| Dewar, Black Hawk | 50623 |
| Dunkerton, Black Hawk | 50626 |
| Elk Run Heights, Black Hawk | 50707 |
| Evansdale, Black Hawk | 50707 |
| Fairbank, Black Hawk | 50629 |
| Gilbertville, Black Hawk | 50634 |
| Hudson, Black Hawk | 50643 |
| Janesville, Black Hawk | 50647 |
| Jesup, Black Hawk | 50648 |
| La Porte City, Black Hawk | 50651 |
| North Cedar, Black Hawk | 50613 |
| Raymar, Black Hawk | 50707 |
| Raymond, Black Hawk | 50667 |
| Voorhies, Black Hawk | 50643 |
| Washburn, Black Hawk | 50702 |
| Waterloo, Black Hawk | 50701, 50702, 50703, 50707 |
| Zaneta, Black Hawk | 50643 |