| Place | Post Code |
|---|---|
| 東大塚 (Higashiotsuka, Yamagata) | 992-0603 |
| 朴沢 (Honosawa, Yamagata) | 999-0153 |
| 堀金 (Horigane, Yamagata) | 999-0142 |
| 上小松 (Kamikomatsu, Yamagata) | 999-0121 |
| 上奥田 (Kamiokuda, Yamagata) | 999-0152 |
| 小松 (Komatsu, Yamagata) | 999-0133 |
| 高豆蒄 (Kozuku, Yamagata) | 999-0132 |
| 黒川 (Kurokawa, Yamagata) | 999-0131 |
| 中小松 (Nakakomatsu, Yamagata) | 999-0122 |
| 西大塚 (Nishiotsuka, Yamagata) | 992-0601 |
| 莅 (Nozoki, Yamagata) | 999-0143 |
| 大舟 (Obune, Yamagata) | 999-0151 |
| 尾長島 (Onagashima, Yamagata) | 999-0213 |
| その他 (Others, Yamagata) | 999-0100 |
| 大塚 (Otsuka, Yamagata) | 992-0602 |
| 下平柳 (Shimohirayanagi, Yamagata) | 999-0212 |
| 下小松 (Shimokomatsu, Yamagata) | 999-0134 |
| 下奥田 (Shimokuda, Yamagata) | 999-0145 |
| 洲島 (Sunoshima, Yamagata) | 999-0211 |
| 高山 (Takayama, Yamagata) | 999-0141 |
| 玉庭 (Tamaniwa, Yamagata) | 999-0361 |
| 時田 (Tokida, Yamagata) | 999-0144 |
| 吉田 (Yoshita, Yamagata) | 999-0214 |
| Postal Codes in Higashiokitama | |
|---|---|
| Kawanishi (川西町) | |
| Takahata (高畠町) | |