CyberHymnal: Lowell Mason: Includes a brief biography, several dozen MIDI hymns tunes.
Famous Americans: Lowell Mason: Biographical article and portrait.
Fifth Avenue Presbyterian Church: Music: Article on music at the church where Mason was once Musical Directory.
Find a Grave: Lowell Mason: Includes location and picture.
Irving S. Gilmore Music Library of Yale University: The Lowell Mason Papers: Includes a summary catalog.
Lowell Mason: Filmography showing the often uncredited use of his hymns in film soundtracks from the Internet Movie Database.
Lowell Mason: Wikipedia article with biography, portrait, assessment of his influence and commentary on his bias toward European style, internal references, and links.
Mason, Lowell: Biography showing his importance to American hymnody and music education and his family heritage from the Grove Concise Dictionary of Music at WQXR radio.
University of Maryland: Lowell Mason Collection: Summary overview of manuscripts, papers, and books included.