Family name Morioka (モリオカ 
, Morioka 
, Мориока 
) , in all the world, is a common cognomen. The family name Morioka is characteristic of South Korea, where it is quite a common surname, Singapore, where it is a rare surname, and Japan. Not in comparison with a country's population, it is the most numerous in South Korea, the United States, and Brazil. Very seldom, Morioka is the forename as well as the last name.
| VARIANT | COUNTRY |
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| モリオカ | Japan |
| Morioka | Brazil, Japan, Indonesia, United States, China |
| Мориока | Russia |
| 류 | South Korea |
| hiroshi morioka Japanese anime director (b. 1901) |
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| hideo morioka botanist (b. 1917) |
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| teizen morioka (b. 1910) |
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zak morioka Brazilian racing driver, BR (b. 1978) |
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| yutaka morioka (b. 1922) |
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| shigeyoshi morioka Japanese artist (born 1941), JP (b. 1941) |
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| yūichi morioka (b. 1950) |
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| noreen morioka (b. 1965) |
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| kazuhito morioka researcher |
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| ikuharu morioka researcher (ORCID 0000-0003-1960-6910) |
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| noriko morioka researcher |
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| masaki s morioka researcher |
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| tsuyoshi morioka Ph.D. University of Toronto 2004 |
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| masanobu morioka researcher |
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| motohiro morioka researcher |
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