| Locality | Post Code |
|---|---|
| Hibari (射水市) | 939-0307, 939-0351 |
| Higashitaikoyama (射水市) | 939-0319 |
| Hinomiya (射水市) | 939-0332 |
| Hirano (射水市) | 939-0323 |
| Hirokami (射水市) | 939-0256 |
| Hojozumachi (射水市) | 934-0022 |
| Hommachi (射水市) | 934-0011 |
| Honden (射水市) | 939-0244 |
| Hongo (射水市) | 933-0244, 933-0246, 933-0243 |
| Hongo Hariyama (射水市) | 933-0248 |
| Hongo Hariyamabiraki (射水市) | 933-0242 |
| Hongo Hariyamashin (射水市) | 933-0249 |
| Hongo Higashi (射水市) | 933-0244 |
| Hongo Kita (射水市) | 933-0244 |
| Hongo Minami (射水市) | 933-0244 |
| Hongo Naka (射水市) | 933-0244 |
| Hongo Nakashin (射水市) | 933-0247 |
| Hongo Nishi (射水市) | 933-0244 |
| Hongo Nochishin (射水市) | 933-0244 |
| Hongo Sanga (射水市) | 933-0244 |
| Hongo Tonami (射水市) | 933-0245 |
| Honkaihotsu (射水市) | 939-0285 |
| Honoki (射水市) | 934-0053 |
| Horiesengoku (射水市) | 933-0226 |
| Horioka (射水市) | 933-0223 |
| Horioka Furumyojin (射水市) | 933-0224 |