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