Last name Otsmaa (Otsmaa 
) , around the world, is a rare cognomen. The family name Otsmaa is characteristic of Estonia, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Otsmaa | Estonia, United States |
| liilia otsmaa Estonian philologist, EE (b. 1925) |
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| vello otsmaa Estonian engineer, EE (b. 1932) |
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| svea otsmaa Estonian economist, EE (b. 1932) |
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| jüri otsmaa Estonian athletics competitor, EE |
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