Surname Maciejko (Maciejko 
) , in the world, is a rare cognomen. The last name Maciejko is characteristic of Poland, where it is quite a rare surname, Romania, where it is a rare surname, and Estonia. Measured by absolute frequency, it most frequently occurs in Poland, the United States, and Romania. Also, Maciejko is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Maciejko | Canada, Poland, France, United States, Romania |
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hryhorij maciejko AR (b. 1913) |
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| tadeusz maciejko UA (b. 1903) |
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| jan maciejko Polish ice hockey player, PL (b. 1913) |
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adrian maciejko ice hockey player (1987-), PL (b. 1987) |
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| katarzyna maciejko-kowalczyk PL (b. 1948) |
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| paweł maciejko Israeli-Polish modern historian, professor and author, IL (b. 1971) |
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| james j maciejko researcher |
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| joseph maciejko researcher ORCID ID = 0000-0002-6946-1492 |
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| wojciech maciejko Polish Righteous Among the Nations, PL |
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| katarzyna maciejko-kowalczy |
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