Family name Kortazar (Cortazar 
, Kortazar 
) , globally, is a common cognomen. The surname Kortazar is habitual in Latin America and the Caribbean, particularly Paraguay, where it is quite a rare surname, Mexico, and Colombia. Measured by absolute frequency, it is commonest in Mexico, Colombia, and Spain. Very seldom, Kortazar is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cortazar | Paraguay, Spain, Colombia, Mexico, United States |
| Kortazar | United States, Spain, Portugal |
| julian barandiaran kortazar ES (b. 1904) |
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dorleta kortazar ES (b. 1974) |
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| jon kortazar Basque writer, ES (b. 1955) |
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| kepa gordejuela kortazar basque politician, ES (b. 1956) |
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| danel kortazar researcher |
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| leire kortazar researcher |
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| mikel kortazar ES (b. 1999) |
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