Family name Ubieto (Ubieto 
) , across the world, is a rare last name. The surname Ubieto is habitual in Guatemala, where it is a rare surname, Spain, and Costa Rica, where it is a very rare surname. Measured by absolute frequency, it is commonest in Spain, Guatemala, and France. Much less frequently, Ubieto is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ubieto | Guatemala, Spain, Argentina, France, Nigeria |
| laureano labarta ubieto Spanish politician, ES (b. 1888) |
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| antonio ubieto Spanish historian, ES (b. 1923) |
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| agustín ubieto Spanish historian, ES (b. 1938) |
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| ricardo ubieto AR (b. 1933) |
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nerea ubieto ES (b. 1984) |
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| guillermo ubieto botanist |
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| antonio-paulo ubieto artur |
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| adrián ubieto Spanish ice hockey player, ES (b. 1993) |
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