The Paraná Delta is the delta of the Paraná River in Argentina. The Paraná flows north–south and becomes an alluvial basin (a flood plain) between the Argentine provinces of Entre Ríos and Santa Fe, then emptying into the Río de la Plata.
The Paraná Delta has an area of about 14,000 km2 (5,405 sq mi) and starts to form between the cities of Santa Fe and Rosario, where the river splits into several arms, creating a network of islands and wetlands. Most of it is located in the jurisdiction of Entre Ríos, and parts in the north of Buenos Aires.