Cognomen Olariaga (Olariaga 
) , in the world, is quite a rare family name. The surname Olariaga is characteristic of Argentina, where it is quite a rare surname, Uruguay, and Spain, where it is a rare surname. Much less frequently, Olariaga is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olariaga | Argentina, Spain, Italy, United States, Uruguay |
| luis olariaga ES (b. 1885) |
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antton olariaga ES (b. 1946) |
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| carlos pérez de bricio olariaga Spanish politician and businessperson, ES (b. 1927) |
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andoni olariaga researcher, ES (b. 1984) |
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| estrella olariaga Spanish actor, ES (b. 1980) |
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| hugo olariaga Argentine basketball player, AR |
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| isaías olariaga Argentine association football player, AR (b. 1986) |
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Ro, Dora, Lisa, Luis, Jose, Jone, Juan, Tomi, Nora, Elsa, Elva, Elba, Emma, Hugo, Ines, Irma, Ivan, Olga, Omar, Yesi, Yrma, Maria, Dina, Daly, Rito, Rita, Sol, Ale, Ana, Ari, Bea, Lia, Noe, Ema, Eva, Fco, Mario, Mary, Sara, Aldo, Anna, Abel, Aida, Cami, Cora, Raul, Rosa, Rene, Manu, and Marta