The Federal Building, also known as the Old Post Office, is a historic institutional building located at 201 North Vienna Street in Ruston, Louisiana.

Built in 1909 to host Ruston Post Office, the structure is a small one-story rectangular limestone building with a hipped roof featuring circular dormers.

[2][3] The building was listed on the National Register of Historic Places on October 9, 1974.

[1] It was also declared a contributing property of Downtown Ruston Historic District at the time of its creation on January 31, 2017.

This article about a property in Louisiana on the National Register of Historic Places is a stub.