Arroyo del Medio

{{about|the arroyo (small river)|the towns|Arroyo del Medio (Misiones)|and|Arroyo del Medio, Entre Ríos}}

The Arroyo del Medio (Spanish, lit. "Middle Creek" or "Middle Stream") is a small river of Argentina, located on (and serving as) the border between the provinces of Buenos Aires and Santa Fe. Its catchment basin comprises about {{convert|3200|km2|mi2}}. The Arroyo empties into the Paraná River at the city of San Nicolás de los Arroyos, Buenos Aires, opposite the Constitución Department in Santa Fe.

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