| Locality | Post Code |
|---|---|
| Clarksville City, Gregg | 75693 |
| Easton, Gregg | 75641 |
| Gladewater, Gregg | 75647 |
| Greggton, Gregg | 75604, 75605 |
| Judson, Gregg | 75660 |
| Kilgore, Gregg | 75662 |
| Lakeport, Gregg | 75603 |
| Liberty City, Gregg | 75662 |
| Longview, Gregg | 75601, 75602, 75603, 75604, 75605 |
| Longview Heights, Gregg | 75601 |
| Pinewood, Gregg | 75602 |
| Tenneryville, Gregg | 75601 |
| White Oak, Gregg | 75693 |