| Locality | Post Code |
|---|---|
| Nakazatocho (新宿区) | 162-0804 |
| Nandomachi (新宿区) | 162-0837 |
| Nijutsukimachi (新宿区) | 162-0855 |
| Nishigokencho (新宿区) | 162-0812 |
| Nishiochiai (新宿区) | 161-0031 |
| Nishishinjuku (新宿区) | 160-0023 |
| Nishishinjuku Odakyu Daiichiseimeib (新宿区) | 163 |
| Nishishinjuku Shinjuku Airandotawa (新宿区) | 163 |
| Nishishinjuku Shinjuku Enuesubiru (新宿区) | 163 |
| Nishishinjuku Shinjuku Erutawa (新宿区) | 163 |
| Nishishinjuku Shinjuku Mitsuibiru (新宿区) | 163 |
| Nishishinjuku Shinjuku Monorisu (新宿区) | 163 |
| Nishishinjuku Shinjuku Nomurabiru (新宿区) | 163 |
| Nishishinjuku Shinjuku Pakutawa (新宿区) | 163 |
| Nishishinjuku Shinjuku Sentabiru (新宿区) | 163 |
| Nishishinjuku Shinjuku Sukueatawa (新宿区) | 163 |
| Nishishinjuku Shinjuku Sumitomobiru (新宿区) | 163 |
| Nishishinjuku Sumitomofudosan Shinj (新宿区) | 160, 163 |
| Nishishinjuku Tokyooperashitei (新宿区) | 163 |
| Nishiwaseda (新宿区) | 162-0051, 169-0051 |
| Okubo (新宿区) | 169-0072 |
| Others (新宿区) | 160-0000 |
| Saikumachi (新宿区) | 162-0838 |
| Samoncho (新宿区) | 160-0017 |
| Shimochiai (新宿区) | 161-0033 |
| Shimomiyabicho (新宿区) | 162-0822 |