Koszewski (feminine Koszewska) is a Polish surname. Notable persons with this name include:
- Andrzej Koszewski (1922–2015), Polish composer
- Dietmar Koszewski (born 1967), German hurdler
- Irvin Koszewski (1924–2009), American bodybuilder
- Waldemar Koszewski (born 1959), Polish physician, neurosurgeon and neurotraumatologist, academic teacher and lecturer
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