Danielewicz is a Polish-language surname, of patronymic origin, meaning descendants of Daniel or Danilo. Notable people with this surname include:
Adam Danielewicz (1846–1935), Polish statistician Sigismund Danielewicz (1847–1927), California trade union organizer and anarchist (1921–1997), Polish historian (born 1942), Polish classical philologist Krzysztof Danielewicz (born 1991), Polish footballer
See also Danielewicz families, several Polish noble families