Okayama Prefecture
| Japanese Name: | 岡山県 |
|---|---|
| Capital City: | Okayama |
| Region: | Chūgoku |
| Island: | Honshu |
| Population: | 1,922,181 |
| Area: | 7,114.62: |

Okayama Prefecture (岡山県, Okayama-ken) is a prefecture of Japan located in the Chūgoku region on the main island of Honshu. The capital is the city of Okayama.