Cognomen 土谷 (土谷 
) , around the world, is a very rare surname. The cognomen 土谷 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 土谷 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 土谷 | China |
| 土谷茂己 badminton player, JP (b. 1930) |
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| 土谷百合香 Japanese seiyū, JP |
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| 土谷智紀 JP (b. 1973) |
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