| Locality | Postal Code |
|---|---|
| Hakusan (文京区) | 112-0001, 113-0001 |
| Hongo (文京区) | 113-0033 |
| Honkomagome (文京区) | 113-0021 |
| Kasuga (文京区) | 112-0003 |
| Kohinata (文京区) | 112-0006 |
| Koishikawa (文京区) | 112-0002 |
| Koraku (文京区) | 112-0004 |
| Mejirodai (文京区) | 112-0015 |
| Mukogaoka (文京区) | 113-0023 |
| Nezu (文京区) | 113-0031 |
| Nishikata (文京区) | 113-0024 |
| Others (文京区) | 112-0000 |
| Otowa (文京区) | 112-0013 |
| Otsuka (文京区) | 112-0012 |
| Sekiguchi (文京区) | 112-0014 |
| Sendagi (文京区) | 113-0022 |
| Sengoku (文京区) | 112-0011 |
| Suido (文京区) | 112-0005 |
| Yayoi (文京区) | 113-0032 |
| Yushima (文京区) | 113-0034 |