Vatslav Vatslavovich Vorovsky (Russian: ??´???? ??´???????? ????´?????; Polish: Waclaw Worowski) (1871–1923) was a Marxist revolutionary, literary critic, and Soviet Russian diplomat.
One of the first Soviet diplomats, Vorovsky is best remembered as the victim of a May 1923 political assassination in Lausanne, Switzerland, where he was the official representative of the Soviet government to the Conference of Lausanne.