Eugenius I
- Brief profile, from the 1911 Encyclopædia Britannica.
- http://encyclopedia.jrank.org/EUD_FAT/EUGENIUS_I.html

St. Eugene
- Biographical paragraph on the pope.
- http://www.catholic.org/saints/saint.php?saint_id=273

Eugenius I, Pope
- Short biography.
- http://www.saintpatrickdc.org/ss/0602.htm#euge

St. Eugene I
- Biography by Joseph Brusher.
- http://www.cfpeople.org/Books/Pope/POPEp75.htm

Eugene I
- Brief biography, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/eugenei.html

Pope St. Eugene I
- Made bishop of Rome after Pope St. Martin I had been in exile for 14 months. Eugene died in 657.
- http://www.newadvent.org/cathen/05598a.htm