Family name Sitkowski (Sitkowski 
) , in the entire world, is quite a rare last name. The cognomen Sitkowski is characteristic of Poland, where it is quite a rare surname, Australia, where it is a rare surname, and the United States, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Poland, the United States, and Germany. Also, Sitkowski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sitkowski | Poland, Australia, United States, United Kingdom, Germany |
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antoni sitkowski Inspector of the Polish State Police (b. 1891) |
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wacław sitkowski Polish cardiac surgeon, PL (b. 1924) |
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władysław sitkowski PL (b. 1928) |
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| roman sitkowski PL (b. 1915) |
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| krzysztof sitkowski Polish basketball player (1935-1988), PL (b. 1935) |
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| andrzej sitkowski PL (b. 1928) |
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| wiesław sitkowski researcher |
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| jerzy sitkowski researcher ORCID ID = 0000-0002-9962-6024 |
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