Surname Ouano (Ouano 
) , worldwide, is quite a common family name. The surname Ouano is habitual in Philippines, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and New Zealand. Measured by absolute frequency, it is the most numerous in Philippines, the United States, and Saudi Arabia.
| VARIANT | COUNTRY |
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| Ouano | Saudi Arabia, United States, United Arab Emirates, Indonesia, Philippines |
| alfredo ouano Filipino politician, PH (b. 1924) |
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| thadeo ouano Mayor of Mandaue City, PH (b. 1944) |
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| bibiano ouano basketball player and basketball coach, PH (b. 1953) |
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| dallas ouano college basketball player (2011–2012) Villanova |
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| ivan ouano Filipino footballer, PH |
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