Cognomen Masiuk (Masiuk 
) , all around the world, is a rare surname. The last name Masiuk is habitual in Belize, where it is quite a rare surname, Belarus, where it is a rare surname, and Poland. Not in comparison with a country's population, it is commonest in Poland, the United States, and Belarus. Also, Masiuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masiuk | Belize, Poland, United States, Argentina, Belarus |
| marzena masiuk badminton player, PL (b. 1959) |
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| helena masiuk researcher ORCID ID = 0000-0003-2587-2035, PL |
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| marek masiuk researcher |
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| olga masiuk (b. 1979) |
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| ksawery masiuk Polish swimmer, PL |
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