| Locality | Post Code |
|---|---|
| Alexis, Gaston | 28006 |
| Belmont, Gaston | 28012 |
| Bessemer City, Gaston | 28016 |
| Boogertown, Gaston | 28052 |
| Catawba Heights, Gaston | 28012 |
| Cherryville, Gaston | 28021 |
| Cramerton, Gaston | 28032 |
| Crowders, Gaston | 28052 |
| Dallas, Gaston | 28034 |
| Flay, Gaston | 28021 |
| Gastonia, Gaston | 28052, 28053, 28054, 28056 |
| Groves, Gaston | 28052 |
| High Shoals, Gaston | 28077 |
| Kings Mountain, Gaston | 28086 |
| Lowell, Gaston | 28098 |
| Lowesville, Gaston | 28164 |
| McAdenville, Gaston | 28101 |
| Mount Holly, Gaston | 28120 |
| Pinkney, Gaston | 28052 |
| Ragan Village, Gaston | 28054 |
| Ranlo, Gaston | 28054 |
| Ridge, Gaston | 28052 |
| Smyre, Gaston | 28052 |
| South Gastonia, Gaston | 28052 |
| Spencer Mountain, Gaston | 28054 |
| Stanley, Gaston | 28164 |