Agustín Gringo Tosco (May 22, 1930 – November 5, 1975) was an Argentine union leader, member of the CGT de los Argentinos and an important participant in the historic local uprising known as the Cordobazo.
At 27 years old, he was the general secretary for Luz y Fuerza (Light and Power utilities workers) in the province of Córdoba.
Tosco felt that nothing could substitute for general assemblies, which he considered superior to representative committees, and that labor struggles should not simply focus on salary demands.
In 1974, after the police coup against the governor Ricardo Obregón Cano, the Luz y Fuerza labor union was abolished, and Tosco was forced to go into hiding.
Agustín Tosco died at 45 years of age, on November 5, 1975, and thousands of people attended his funeral, despite threats from the government of Isabel Perón and the Alianza Anticomunista Argentina (Argentine Anticomunist Alliance, a far right death squad).