The Unión Santafesina also runs the Santa Fe team that represented the province in the now defunct Campeonato Argentino.

The best placed teams of USR competitions qualify to play the Torneo del Litoral, along with clubs from the Rosario and Entre Ríos Unions.

In 1949 the Unión de Rugby del Río Paraná was founded.

Its role was to represent and organise competitions for clubs from both Santa Fe and Entre Ríos provinces.

As of September 2021[update], affiliated clubs that participate in competitions organised by the USR are:[1] This article about a sports-related organization is a stub.