Family name Muiñoz (Muiñoz 
) , globally, is a very rare last name. The last name Muiñoz is habitual in Latin America and the Caribbean, particularly Argentina, where it is a very rare surname, and Venezuela. Much less frequently, Muiñoz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Muiñoz | Venezuela, Spain, Argentina |
| héctor homero muiñoz Uruguayan writer, UY (b. 1888) |
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| raúl muiñoz Uruguayan writer, UY |
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| josé r. muiñoz UY |
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