The community of Alden, Michigan is named for him. Mr. Smith was married on October 21, 1886, to Nancy Alice ("Nana") Osterhout (October 21, 1859 – February 15, 1936) of Grand Rapids. They had one son, William Alden Smith, Jr. who died on April 19, 1920, at the age of 27. The second Disabled American Veterans chapter ever organized was in Kentwood, Michigan and is named for him. The younger Smith was married to Marie McRae, daughter of Mr. and Mrs. Milton A. McRae of Detroit and San Diego, California. This couple had a son, William Alden, III, who died on December 16, 1968, in San Diego, California at the age of 52. They are all buried in the family mausoleum at Woodlawn Cemetery, Grand Rapids, Michigan.