Family name Mroczka (Mroczka 
) , around the globe, is quite a rare cognomen. The last name Mroczka is characteristic of Poland, where it is quite a rare surname, the United States, where it is a rare surname, and New Zealand. Measured by absolute frequency, this name is the most popular in Poland, the United States, and Brazil. Likewise, Mroczka is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mroczka | Germany, Brazil, Poland, United States, United Kingdom |
| stanisław mroczka PL (b. 1925) |
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| zofia mroczka PL (b. 1934) |
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| ludwik mroczka (b. 1938) |
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| janusz mroczka PL (b. 1952) |
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| kamil mroczka Polish political scientist, PL |
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| robert mroczka researcher |
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| artur mroczka Polish speedway rider, PL (b. 1989) |
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