| Locality | Post Code |
|---|---|
| Ada, Mercer | 24701 |
| Athens, Mercer | 24712 |
| Beeson, Mercer | 24714 |
| Bluefield, Mercer | 24701 |
| Bluewell, Mercer | 24701 |
| Bramwell, Mercer | 24715 |
| Brush Fork, Mercer | 24701 |
| Camp Creek, Mercer | 25820 |
| Ceres, Mercer | 24701 |
| Coaldale, Mercer | 24724 |
| Dott, Mercer | 24736 |
| Duhring, Mercer | 24747 |
| Elgood, Mercer | 24740 |
| Flat Top, Mercer | 25841 |
| Freeman, Mercer | 24724 |
| Giatto, Mercer | 24736 |
| Green Valley, Mercer | 24701 |
| Hiawatha, Mercer | 24729 |
| Kegley, Mercer | 24731 |
| Kellysville, Mercer | 24732 |
| Lashmeet, Mercer | 24733 |
| Lerona, Mercer | 25971 |
| Littlesburg, Mercer | 24701 |
| Lorton Lick, Mercer | 24701 |
| Matoaka, Mercer | 24736 |
| McComas, Mercer | 24747 |