St. Kateri Tekakwitha
Feast Day: July 14
Patron of the Environment; People in Exile
St. Katharine Drexel
Feast Day: March 3
Patron against Racism
St. Kenneth/ Saint Cainnech of Aghaboe/Saint Canice in Ireland/Saint Kenneth in Scotland/Saint Kenny/Saint Canicus
Feast Day: October 11
Patron of the Shipwrecked
St. Kevin / Saint Kevin of Glendalough/ Saint Cóemgen
Feast Day: June 3
Patron of Blackbirds and Ireland
St. Kilian
Feast Day: July 8
Patron of Whitewashers and Rheumatism
St. Lawrence
Feast Day: August 10
Patron of Chefs and Comedians
St. Lazarus
Feast Day: June 21
Patron of Leprosy
St. Leo the Great
Feast Day: November 10
Patron of Speakers
St. Lidwina of Schiedam/Saint Lydwine
Feast Day: April 14
Patron of Sickness
St. Lillian
Feast Day: July 27
Patron of those named Lillian
St. Louis /King Louis IX of France
Feast Day: August 25
Patron of Builders and Parenthood
St. Louise de Marillac
Feast Day: March 15
Patron of Orphans and Social Workers
St. Lucia of Syracuse / Saint Lucy
Feast Day: December 13
Patron of Eye Diseases and Writers
St. Luigi Orione
Feast Day: March 12
Patron of the Poor, Homeless and Abandoned
St. Luke the Apostle
Feast Day: October 18
Patron of Physicians and Painters
St. Madeline Sophie Barat
Feast Day: May 25
Patron of the Society of the Sacred Heart
St. Madonna del Ghisallo
Feast Day: October 13
Patron of Cyclists
St. Malachy O'More
Feast Day: November 3
Patron of the Archdiocese of Armagh, Ireland
St. Marcellin Champagnat
Feast Day: June 6
Patron of Education
St. Margaret of Cortona
Feast Day: February 22
Patron of Midwives and the Homeless
St. Margaret Mary Alacoque
Feast Day: October 17
Patron of Polio and Loss of Parents; Patron of those devoted to the Sacred Heart of Jesus
St. Maria Faustina
Feast Day: October 5
Patron of the Apostle of Divine Mercy
St. Maria Goretti
Feast Day: July 6
Patron of Teenage Girls and Loss of Parents
St. Mark the Evangelist
Feast Day: April 25
Patron of Notaries and Lawyers
St. Martha
Feast Day: July 29
Patron of Maids and Innkeepers
St. Martin de Porres
Feast Day: November 3
Patron of Bi-racial People and Television
St. Martin of Tours
Feast Day: November 11
Patron of Reformed Alcoholics
St. Mary Magdalene
Feast Day: July 22
Patron of Converts; Apothecaries;Pharmacists
St. Matilda
Feast Day: March 14
Patron of the Falsely Accused
St. Matthew the Apostle
Feast Day: September 21 (West); November 16 (East)
Patron of Accountants and Bankers
St. Matthias the Apostle
Feast Day: May 14
Patron againsts Alcoholism; Tailors and Carpenters
St. Maurus
Feast Day: October 5
Patron of Cripples, Cobblers ; invoked against Rheumatism, Epilepsy and Colds
St. Maximilian Kolbe
Feast Day: August 14
Patron of Charity and Drug Abuse; Pro-life movement
St. Meinrad of Einsiedeln
Feast Day: January 21
Patron of Switzerland and Hospitality
St. Michael the Archangel
Feast Day: September 29
Patron of Police Officers and Emergency Medical Technicians
St. Monica
Feast Day: August 27
Patron of Abuse Victims, Difficult Marriages, Disappointing Children; Victims of Verbal Abuse
St. Nicholas
Feast Day: December 6
Patron of Children, Bakers, and Brides
St. Nimatullah/ Saint Nimattullah Kassab Al-Hardini
Feast Day: December 14
Patron of Beirut, Lebanon
St. Odilia /Saint Odile or Ottilia
Feast Day: July 18
Patron of Eye Disease and Eye Problems