Yamagata Prefecture
| Japanese Name: | 山形県 |
|---|---|
| Capital City: | Yamagata |
| Region: | Tōhoku |
| Island: | Honshu |
| Population: | 1,122,957 |
| Area: | 9,323.15: |

Yamagata Prefecture (山形県, Yamagata-ken) is a prefecture of Japan located in the Tōhoku region on Honshu island. Its capital is Yamagata.