Manx Notebook: St. Columba
- Brief illustrated biography.
- http://www.isle-of-man.com/manxnotebook/parishes/ay/stcolum.htm

For All the Saints: Columba
- Also called Columbus, Combs, or Columkill. Long hagiographical essay.
- http://www.saintpatrickdc.org/ss/0609.htm#colu

Life of St. Columba
- A translation from the Latin. Written by Adamnan. 242K.
- http://www.fordham.edu/halsall/basis/columba-e.html

Catholic Online: St. Columba
- Brief biography.
- http://www.catholic.org/saints/saint.php?saint_id=419

Columba of Iona
- Short biography, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/columba.html

Columba, Abbot of Iona and Missionary
- Brief biography. With prayer in traditional and contemporary language.
- http://elvis.rowan.edu/~kilroy/JEK/06/09.html

Catholic Encyclopedia: St. Columba
- Also known as Columcille. Long article on the Irish-born monk, founder and abbot of Iona. He died in 597.
- http://www.newadvent.org/cathen/04136a.htm

Saint Columba, Abbot, Confessor
- From the book "Lives of Saints," published by John J. Crawley.
- http://www.ewtn.com/library/MARY/COLUMBA.htm

St. Columba, or Columkille
- Hagiography. From Alban Butler's Lives of the Saints.
- http://www.ewtn.com/library/MARY/STCOLUMB.htm

Columbia Encyclopedia: Columba, Saint
- Brief biographical entry.
- http://www.bartleby.com/65/co/Columba.html

Patron Saints Index: Columba
- Also known as Colmcille. Illustrated profile.
- http://www.catholic-forum.com/saints/saintc17.htm

St. Columba, or Columcille, 521-597
- Short biography.
- http://www.cin.org/columba.html