Ratajczyk is a Polish surname. Notable people with the surname include:
Adam Ratajczyk (born 2002), Polish footballer Krzysztof Ratajczyk (born 1973), Polish footballer Peter Thomas Ratajczyk (1962–2010), a.k.a. Peter Steele, singer and bassguitar player of Type O Negative Rafał Ratajczyk (born 1983), Polish cyclist
See also Ratajczak