Family name Olejniczak (Olejniczak 
) , around the globe, is a common surname. The family name Olejniczak is habitual in Poland, where it is quite a common surname, Ireland, where it is a rare surname, and Germany. Measured by absolute frequency, it is the most numerous in Poland, the United States, and Germany. Also, Olejniczak is the forename as well as the last name.
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| Olejniczak | Germany, France, Poland, United Kingdom, United States |
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stanisław olejniczak Polish teacher, DE (b. 1905) |
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dominic olejniczak American politician, sports executive (1908-1989), US (b. 1908) |
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tadeusz apoloniusz olejniczak PL (b. 1923) |
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| franciszek olejniczak PL (b. 1877) |
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| jan olejniczak (b. 1879) |
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| franciszek olejniczak AT (b. 1885) |
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| stanisław olejniczak association football player (1902-1975), UA (b. 1902) |
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janusz olejniczak Polish actor and musician, PL (b. 1952) |
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andrzej olejniczak Polonian jazz saxophonist, PL (b. 1954) |
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| jan olejniczak Polish officer, PL (b. 1906) |
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| franciszek olejniczak French association football player (1910-1991), FR (b. 1910) |
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| stan olejniczak American-football player (1912-1979), US (b. 1912) |
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| jan olejniczak polish cinematographer, PL (b. 1918) |
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| józef olejniczak Polish speedway rider (1918-2001), PL (b. 1918) |
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cezary olejniczak Polish politician and deputy, PL (b. 1972) |
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