Family name Groszek (Groszek 
) , worldwide, is quite a rare cognomen. The family name Groszek is habitual in Poland, where it is quite a rare surname, Czechia, where it is a rare surname, and France. In absolute terms, it is the most numerous in Poland, the United States, and France. Also, Groszek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Groszek | Germany, Australia, United States, Poland, France |
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mieczysław groszek Polish economist, PL (b. 1951) |
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| jerzy groszek PL (b. 1929) |
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| marcia groszek American mathematician |
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| barbara groszek researcher |
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| artur groszek researcher ORCID ID = 0000-0003-1047-4579 |
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| tomasz groszek |
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