Danilowicz is a Polish-language surname of, among others, a noble family of Rutheninan origin and Jews with roots in Dunilavičy, Belarus and other place names which include "Daniłowicz" (including the form "Duniłowicze") in their names. Its archaic feminine form is Daniłowiczówna.
A transliteration of its Ruthenian/Russian form is Danilovich. The surname should not be confused with the East Slavic patronymic "Danilovich". Both literally mean the same, "son of Danilo", but in the pronunciation of the surname the stress syllable is penultimate, while in the patronymic the second syllable is stressed.
Variant forms include Danilowitz, Danilovitz, and Danielevitz, with the surnames sometimes being influenced by the names Daniel and Levitz. The name in Yiddish is spelled דאַנילאָוויץ (Danilovitz).
The same surname in Serbian is Danilović.
The surname may refer to: