Federación is a city in the northeast of the
province of
Entre Ríos,
Argentina. It has 13,789 inhabitants as per the . It lies on the provincial and international border with
Uruguay, by the
reservoir of the
Salto Grande Dam, on the right-hand (western) banks of the
Uruguay River, about 45 km upstream from the city of
Concordia and 265 km from the provincial capital
Paraná, near
National Route 14. The original town was a ranch and waypost, named Mandisoví, created in 1777, which grew into a prosperous village but fell then to civil strife. A new town of Mandisoví was founded in a close location by Colonel Manuel Antonio Urdinarrain, who commanded the area, under the orders of the
caudillo Justo José de Urquiza. Urdinarrain notified Urquiza about the new town and asked him to name it. Urquiza chose the name
Pueblo de la Federación (Town
[or People] of the Federation).