For All the Saints: Pius V
- Long biographical essay on the Dominican pope, reformer, and saint who combatted Lutheranism and Calvinism.
- http://www.saintpatrickdc.org/ss/0430.htm#pius

Catholic Encyclopedia: Pope St. Pius V
- Biography of the sixteenth-century pontiff.
- http://www.newadvent.org/cathen/12130a.htm

St Pius V, Pope, Confessor
- Entry in Alban Butler's Lives of the Saints.
- http://www.ewtn.com/library/MARY/PIUSV.htm

The Saints: St. Pius V
- Article from "The Saints: A Concise Biographical Dictionary."
- http://www.cin.org/saints/piusv.html

Catholic Community Forum: Pope St. Pius V
- Biographical sketch.
- http://www.catholic-forum.com/themes/st_pius_v.html

Popes Through the Ages: St. Pius V
- Brief account of his pontificate.
- http://www.cfpeople.org/Books/Pope/POPEp223.htm

Pope Pius V
- Illustrated profile, with links.
- http://www.catholic-forum.com/saints/saintp32.htm