| Locality | Post Code |
|---|---|
| Alex, McClain | 73002 |
| Blanchard, McClain | 73010 |
| Byars, McClain | 74831 |
| Cole, McClain | 73010 |
| Dibble, McClain | 73031 |
| Goldsby, McClain | 73093 |
| Lindsay, McClain | 73052 |
| Maysville, McClain | 73057 |
| Newcastle, McClain | 73065 |
| Purcell, McClain | 73080 |
| Rosedale, McClain | 74831 |
| Washington, McClain | 73093 |
| Wayne, McClain | 73095 |