Family name Kowalczuk (Kowalczuk 
, Ковальчук 
) , around the globe, is a widespread last name. The family name Kowalczuk is characteristic of Eastern Europe, particularly Ukraine, where it is a common surname, Belarus, where it is quite a common surname, and Russia (explore the name in all countries). Much less frequently, Kowalczuk is the forename as well as the last name.
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| Kowalczuk | Brazil, Argentina, Poland, United States, France |
| Ковальчук | Kyrgyzstan, Russia, Kazakhstan, Ukraine, Belarus |
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jan kowalczuk Captain of the Polish Army, PL (b. 1893) |
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jerzy kowalczuk Polish geophysicist, PL (b. 1926) |
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| józef kowalczuk PL (b. 1885) |
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piotr kowalczuk deputy president of Gdańsk, PL (b. 1976) |
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| jadwiga kowalczuk Polish sportsperson and athletics competitor, PL (b. 1931) |
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| zdzisław kowalczuk Polish engineer, PL (b. 1953) |
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| ilko-sascha kowalczuk German historian, DE (b. 1967) |
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| cezary kowalczuk (b. 1960) |
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| cezary kowalczuk PL (b. 1960) |
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| zygmunt kowalczuk (b. 1963) |
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| hugo kowalczuk (b. 1967) |
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| marek kowalczuk researcher (ORCID 0000-0002-2877-7466) |
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| piotr kowalczuk researcher ORCID ID = 0000-0001-6016-0610 |
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| paweł kowalczuk basketball player (1980-), PL (b. 1980) |
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| dorota kowalczuk researcher, PL |
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