| Locality | Post Code |
|---|---|
| Barnes Corners, Lewis | 13626 |
| Beaver Falls, Lewis | 13305 |
| Beaver River, Lewis | 13367 |
| Belfort, Lewis | 13327 |
| Brantingham, Lewis | 13312 |
| Castorland, Lewis | 13620 |
| Chase Lake, Lewis | 13343 |
| Collinsville, Lewis | 13433 |
| Constableville, Lewis | 13325 |
| Copenhagen, Lewis | 13626 |
| Croghan, Lewis | 13327 |
| Dadville, Lewis | 13367 |
| Deer River, Lewis | 13627 |
| Denmark, Lewis | 13631 |
| Diana, Lewis | 13648 |
| East Pitcairn, Lewis | 13648 |
| Fish Creek, Lewis | 13325 |
| Fowlersville, Lewis | 13433 |
| Geers Corners, Lewis | 13648 |
| Glenfield, Lewis | 13343 |
| Goulds Mill, Lewis | 13368 |
| Greig, Lewis | 13345 |
| Harrisburg, Lewis | 13367 |
| Harrisville, Lewis | 13648 |
| Houseville, Lewis | 13473 |
| Indian River, Lewis | 13327 |