Last name Kiyooka (Kiyooka 
) , throughout the world, is a very rare surname. The cognomen Kiyooka is habitual in Canada, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. More prevalently, Kiyooka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kiyooka | Japan, China, United States, Canada, Brazil |
| gomei kiyooka (b. 1881) |
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| eiichi kiyooka born:1902|died:1997|; Kiyooka, Eiichi; 清岡, 暎一, 1902-1997; Kiyooka, Eiichi 1902-1997; 清岡, 暎一 (b. 1902) |
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| mary kiyoshi kiyooka (b. 1896) |
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| soichi kiyooka (b. 1915) |
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