| Locality | Post Code |
|---|---|
| Aurora, York | L4G |
| Baldwin, York | L0E 1A0 |
| Cedar Valley, York | L0G, L4A |
| Concord, York | L4K |
| East Gwillimbury, York | L9N |
| Gormley, York | L0H, L4A |
| Holland Landing, York | L9N |
| Jacksons Point, York | L0E 1L0 |
| Keswick, York | L4P |
| King, York | L7B |
| King City, York | L7B |
| Kleinburg, York | L0J, L4H |
| Locust Hill, York | L0H |
| Maple, York | L6A |
| Markham, York | L3P, L3R, L3S, L6B, L6C, … |
| Newmarket, York | L3X, L3Y, L4A |
| Nobleton, York | L0G, L7B |
| Pefferlaw, York | L0E |
| Queensville, York | L0G |
| Richmond Hill, York | L3P, L3T, L4B, L4C, L4E, … |
| River Drive Park, York | L9N |
| Roches Point, York | L0E 1P0 |
| Schomberg, York | L0G |
| Stouffville, York | L4A |
| Sutton West, York | L0E |
| Thornhill, York | L3T, L4J |