Cognomen 岡 治 (岡 治 
) , all around the world, is a very rare family name. The last name 岡 治 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 岡 治 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 岡 治 | China |