The L'Union Saint Jean-Baptiste d'Amerique is a historic building at 1 Social Street in Woonsocket, Rhode Island.

The building is also a prominent example of Classical Revival architecture, designed by a French Canadian immigrant architect, Walter F. Fontaine.

[1] The L'Union Saint Jean-Baptist d'Amerique building occupies a prominent site at the northern end of Woonsocket's Monument Square, at the southern corner of Social and Worrall Streets.

The facade faces west toward Social Street and Monument Square, and is dominated by monumental Corinthian columns and pilasters that rise from the second floor to an entablature beneath the projecting cornice.

[2] L'Union Saint-Jean-Baptiste d’Amerique (USJB) was founded in 1900 to serve a burgeoning French Canadian immigrant population in New England and the United States, drawn by the prospect of employment in the many textile mills.