The best placed teams of the UER qualify to play in the Torneo del Litoral along with clubs from the Rosario and Santa Fe unions.

The Union was founded on 30 March 1979 when the rugby clubs of Paraná, Entre Ríos, decided to create their own body because they took part in the Unión Santafesina de Rugby.

Other clubs then asked to be part of the union from cities such as Diamante, La Paz, Concordia, Concepción del Uruguay, Gualeguay and Nogoyá.

Clubs affiliated to the Union as of June 2018:[1] This article about sports in Argentina is a stub.

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