Surname Mroczko (Mroczko 
) , globally, is a rare last name. The family name Mroczko is characteristic of Poland, where it is a rare surname, Brazil, where it is a very rare surname, and France. Measured by absolute frequency, it most frequently occurs in Poland, Brazil, and the United States. Likewise, Mroczko is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mroczko | Poland, Brazil, United States, Argentina, France |
| teresa mroczko Polish art historian (1932-1990), PL (b. 1932) |
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| marian mroczko Polish historian, PL (b. 1938) |
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| barbara mroczko researcher, ORCID id # 0000-0002-4075-8479, PL (b. 1968) |
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| barbara mroczko researcher (ORCID 0000-0002-8173-9960) |
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| piotr mroczko researcher |
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| mroczko z rogowa |
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