| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Kofukumachi (高岡市) | 933-0067 |
| Postal/ZIP Codes in Koizumishin (高岡市) | 939-1261 |
| Postal/ZIP Codes in Kojo (高岡市) | 933-0044 |
| Postal/ZIP Codes in Komagata (高岡市) | 933-0338 |
| Postal/ZIP Codes in Kommadashimachi (高岡市) | 933-0914 |
| Postal/ZIP Codes in Koryomachi (高岡市) | 933-0018 |
| Postal/ZIP Codes in Kumanomachi (高岡市) | 933-0903 |
| Postal/ZIP Codes in Kuniyoshi (高岡市) | 933-0968 |
| Postal/ZIP Codes in Kuranomachi (高岡市) | 933-0834 |
| Postal/ZIP Codes in Kurodashimmachi (高岡市) | 933-0854 |
| Postal/ZIP Codes in Kyoden (高岡市) | 933-0874 |
| Postal/ZIP Codes in Kyomachi (高岡市) | 933-0917 |
| Postal/ZIP Codes in Maedacho (高岡市) | 933-0017 |
| Postal/ZIP Codes in Makinokanaya (高岡市) | 934-0097 |
| Postal/ZIP Codes in Marunochi (高岡市) | 933-0912 |
| Postal/ZIP Codes in Matsubaracho (高岡市) | 933-0845 |
| Postal/ZIP Codes in Meiwamachi (高岡市) | 933-0812 |
| Postal/ZIP Codes in Miharamachi (高岡市) | 933-0012 |