| Place | Post Code |
|---|---|
| Artarmon, Willoughby | 2064 |
| Castle Cove, Willoughby | 2069 |
| Castlecrag, Willoughby | 2068 |
| Chatswood, Willoughby | 2067 |
| Chatswood West, Willoughby | 2067 |
| Middle Cove, Willoughby | 2068 |
| Middle Harbour, Willoughby | 2087 |
| Naremburn, Willoughby | 2065 |
| North Willoughby, Willoughby | 2068 |
| Northbridge, Willoughby | 2063 |
| Willoughby, Willoughby | 2068 |
| Willoughby East, Willoughby | 2068 |
| Willoughby North, Willoughby | 2068 |