Family name Wilczyk (Wilczyk 
) , across the world, is a rare last name. The family name Wilczyk is characteristic of Poland, where it is a rare surname, Israel, and France, where it is a very rare surname. Measured by absolute frequency, it is commonest in Poland, Israel, and the United States. Likewise, Wilczyk is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wilczyk | United States, Poland, Argentina, France, Israel |
| nachmann wilczyk holocaust victim, b. 1862-04-30, CZ (b. 1862) |
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| wojciech wilczyk Polish poet, PL (b. 1961) |
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| katarzyna wilczyk |
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| szymon wilczyk PL (b. 1994) |
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