Jorge López Ruiz (1 April 1935 – 11 December 2018) was an Argentine jazz double bassist, cellist, pianist, composer and arranger.

López Ruiz was born in La Plata. His younger brother was guitarist, arranger and composer Oscar López Ruiz. After starting out on trumpet, he soon switched to double bass. In 1961 he released B.A. Jazz, his first album as leader, with a quintet featuring Gato Barbieri. On the recommendation of Astor Piazzolla, he studied harmony and composition for Alberto Ginastera in the mid-60’s. In 1967 El grito was released, an orchestral jazz suite with López Ruiz as composer and arranger. Between 1967 and 1970, he was a musical director for CBS in Argentina, working with a number of successful Argentine pop artists, such as Sandro and Leonardo Favio. In 1968, he was part of pianist Enrique “Mono” Villegas‘ trio, together with drummer Osvaldo López.