Mary Anne Swanton immigrated to Boston, where she married William Scanlon on November 29, 1911. They were married in the Gate of Heaven Catholic Church in South Boston, MA by Father R. J. Johnson. Their marriage witnesses were Patrick Scanlon and Julia Casey.
On August 9, 1922, Mary Anne Swanton Scanlon lived at 2 Lincoln Park in South Boston, Massachusetts with her half sister, Johanna (Hannah) Swanton.