Raúl Sendic Antonaccio (March 16, 1926 – April 28, 1989) was a Uruguayan lawyer, trade unionist and founder of the National Liberation Movement – Tupamaros (MLN–T).

After beginning his legal career organising agricultural workers and agitating for land reform, he moved into militant activism and established the MLN–T to carry out urban guerrilla warfare against the Uruguayan state.

After studying law and joining the Socialist Party of Uruguay, during the 1950s, he worked as a lawyer for rural trade unions and founded a number himself, organising sugarcane workers in the Artigas Department.

It also kidnapped and executed certain political targets, including Dan Mitrione, an FBI agent alleged to have taught techniques of torture to police forces in various Latin American countries.

On 7 August 1970, Sendic was arrested and imprisoned in Punta Carretas, but he and over 100 other Tupamaros prisoners managed to escape through a tunnel the following month.