Civil unrest in Rosario, Argentina, known as Rosariazo, following the death of a 15-year-old student.

Rosario is the largest city in the central Argentine province of Santa Fe. The city, located 300 km (186 mi) northwest of Buenos Aires on the west bank of the Paraná River, is the third-most populous city in the country after Buenos Aires and Cordoba. With a growing and important metropolitan area, Greater Rosario has an estimated population of 1,750,000 as of 2020. One of its main attractions includes the neoclassical, Art Nouveau, and Art Deco architecture that has been preserved in hundreds of residences, houses and public buildings. The city is also famous for being the birthplace of the Argentine footballer Lionel Messi.

The Rosariazo was a protest movement that consisted in demonstrations and strikes, in Rosario, province of Santa Fe, Argentina, between May and September 1969, during the military dictatorial rule of de facto President General Juan Carlos Onganía. The Rosariazo was caused by events in other parts of Argentina, and in turn triggered similar protests itself.