Czarnik is a surname. Notable people with the surname include:
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Anthony Czarnik
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Anthony W. Czarnik (born 1957) is an American chemist and inventor. He is best known for pioneering studies in the field of fluorescent Molecular sensor, chemosensors and co-founding Illumina, Inc., a biotechnology company in San Diego. Czarnik ...
, an American scientist and inventor
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Austin Czarnik
Austin Czarnik (born December 12, 1992) is an American professional ice hockey center for the Grand Rapids Griffins of the American Hockey League (AHL) while under contract to the Detroit Red Wings of the National Hockey League (NHL). Undrafted, ...
(born 1992), American professional ice hockey player
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Marcin Czarnik (born 1976), Polish film and theatre actor
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Melissa Czarnik, emcee and poet based in Brooklyn, NY
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Tamarack Czarnik, a medical researcher focused on outer space
{{Surname
Polish-language surnames