 In 1936 Walsh was chairman of the Catholic Citizen's Committee for Ratification of the Federal Child Labor Law.In 1941 the Walsh family donated the collected files of Walsh to the New York Public Library

For a time, Walsh's secretary in New York was Sarah Lucille Turner, who had been one of the first women elected to the Missouri House of Representatives.Frank P. Walsh died of a heart attack while walking along a street in New York City on May 2, 1939.