Litwinowicz is a Polish and a Belarusian surname derived from the word litwin meaning "a Lithuanian". The Belarusian variant of spelling is Litvinovič (Лiтвiновiч), and the English one is Litvinovich.
Surnames of similar etymology: Slavic: Litvin, Litvinchuk, Litvinov, Litwin, , Litovchenko; German: Litauer, Littauer.
Litwinowicz may refer to: