| Locality | Post Code |
|---|---|
| Blackstock, Fairfield | 29014 |
| Blair, Fairfield | 29015 |
| Carlisle, Fairfield | 29031 |
| Great Falls, Fairfield | 29055 |
| Greenbrier, Fairfield | 29180 |
| Jenkinsville, Fairfield | 29065 |
| Longtown, Fairfield | 29130 |
| Monticello, Fairfield | 29065 |
| Ridgeway, Fairfield | 29130 |
| Rion, Fairfield | 29132 |
| Smallwood, Fairfield | 29130 |
| White Oak, Fairfield | 29180 |
| Winnsboro, Fairfield | 29180 |
| Winnsboro Mills, Fairfield | 29180 |