Cognomen Tomioka (トミオカ 
, Tomioka 
) , around the globe, is quite a rare last name. The cognomen Tomioka is habitual in Eastern Asia, particularly Taiwan, where it is a rare surname, Japan, and South Korea. Not in comparison with a country's population, it is the most numerous in Japan, Brazil, and South Korea. More frequently, Tomioka is the forename as well as the last name.
| VARIANT | COUNTRY |
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| トミオカ | Japan |
| Tomioka | Taiwan, Japan, Brazil, Myanmar, South Korea |
| koei tomioka Kannushi (b. 1928) |
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| yukio tomioka (b. 1925) |
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| keisō tomioka (b. 1926) |
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| akira tomioka Japanese politician (b. 1950) |
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| taeko tomioka Japanese amateur wrestler, JP (b. 1979) |
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| akiko tomioka researcher |
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| satoshi tomioka researcher |
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| azusa tomioka researcher |
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| kodai tomioka researcher |
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| ryohei tomioka researcher |
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| ryota tomioka researcher, machine learning, Microsoft Research Cambridge |
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| haruaki tomioka researcher |
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| hideki tomioka researcher |
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| yoko tomioka researcher |
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| katsuhiro tomioka researcher, ORCID id # 0000-0003-3482-2371 |
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