Family name Kaario (Kaario 
) , around the globe, is a rare surname. The last name Kaario is characteristic of Finland, where it is quite a rare surname, Denmark, where it is a rare surname, and Canada, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Kaario | Denmark, Canada, Finland, France, United States |
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simo kaario Finnish actor (1876-1944), FI (b. 1876) |
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helvi kaario Finnish stage actress (1887-1958), FI (b. 1887) |
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toivo kaario Finnish engineer, FI (b. 1912) |
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| nikolai kaario Finnish painter, FI (b. 1887) |
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matti kaario Finnish ice hockey player, FI (b. 1953) |
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| kari kaario Finn basketball player (1958-), FI (b. 1958) |
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| mammu kaario Finnish judge, investment banker, FI (b. 1963) |
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