For All the Saints: Saint Catherine of Siena
- Illustrated biography.
- http://www.saintpatrickdc.org/ss/0429cath.htm

Catholic Online: St. Catherine of Siena
- Brief hagiography of this Doctor of the Church, and patron saint of Italy.
- http://www.catholic.org/saints/saint.php?saint_id=9

The Ecole Glossary: Catherine of Siena
- Brief biography, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/cathsiena.html

Catherine of Siena, Saint
- Biographical article in the Columbia Encyclopedia, 6th ed. Includes bibliography.
- http://www.bartleby.com/65/ca/CathrinSi.html

Women Saints, Doctors of the Church
- Short feature story by Jone Johnson Lewis on SS. Teresa of Avila and Catherine of Siena, the first two women Doctors of the Church.
- http://womenshistory.about.com/library/weekly/aa021599.htm?once=true&

Lives of Saints: Saint Catherine of Siena
- Virgin. From the book "Lives of Saints", published by John J. Crawley.
- http://www.ewtn.com/library/MARY/CATSIENA.htm

Catherine of Sienna, Reformer and Spiritual Teacher
- Biographical profile. With prayer in traditional and contemporary language.
- http://elvis.rowan.edu/~kilroy/JEK/04/29.html

St. Catherine of Sienna, Virgin
- From Fr. Alban Butler's Lives of the Saints.
- http://www.ewtn.com/library/MARY/CSIENA.htm

St. Catherine of Sienna, 1347-1380
- Essay on her life, from the book "The Saints: A Concise Biographical Dictionary," edited by John Coulson.
- http://www.cin.org/saints/cathsiena.html

Catholic Encyclopedia: St. Catherine of Siena
- Third Order Dominican, hermit, reformer, mystic, d. 1380. Biographical article by Edmund G. Gardner.
- http://www.newadvent.org/cathen/03447a.htm

Patron Saints Index: Catherine of Siena
- Illustrated profile.
- http://www.catholic-forum.com/saints/saintc02.htm

Domestic Church: Saint Catherine of Siena
- Three accounts: for children ages 0-8, children 8-14, and ages 14-adult.
- http://www.domestic-church.com/CONTENT.DCC/19980301/SAINTS/ST_CATH.HTM

Miniature Stories of Saints: Saint Catherine of Siena
- A short life of St. Catherine of Siena, for children. From the book by Daniel A. Lord.
- http://www.adena.com/adena/sts/siena.htm