A patron saint, patroness saint, patron hallow or heavenly protector is a saint who in Roman Catholicism and Eastern Orthodoxy is regarded as the heavenly advocate of a nation, place, craft, activity, class, clan, family or person. Catholics believe that patron saints, having already transcended to the metaphysical, are able to intercede effectively for the needs of their special charges.
Saints often become the patrons of places where they were born or had been active. However, there were cases in Medieval Europe where a city which grew to prominence and obtained for its cathedral the remains or some relics of a famous saint who had lived and was buried elsewhere, thus making him or her the city's patron saint – such a practice conferred considerable prestige on the city concerned. In Latin America and the Philippines, Spanish and Portuguese explorers often named a location for the saint on whose feast or commemoration they first visited the place, with that saint naturally becoming the area's patron.
Professions sometimes have a patron saint owing to that individual being involved somewhat with it, although some of the connections were tenuous. Lacking such a saint, an occupation would have a patron whose acts or miracles in some way recall the profession. For example, when the previously unknown profession of photography appeared in the 19th century, Saint Veronica was made its patron, owing to how her veil miraculously received the imprint of Christ's face after she wiped the blood and sweat off. 
The veneration or "commemoration" and recognition of patron saints or saints in general is found in Roman Catholicism, Eastern Catholicism, Eastern Orthodoxy, Oriental Orthodoxy, Lutheranism and Anglicanism.
- Calendar of saints
- Guardian angel
- List of blesseds
- List of saints
- Name day
- Patron saints of ailments, illness, and dangers
- Patron saints of occupations and activities
- Patron saints of places
- Patron saints of ethnic groups
- Saint symbolism
- Slocum, Robert Boak; Armentrout, Donald S. (1999). An Episcopal Dictionary of the Church: A User-Friendly Reference for Episcopalians. Church Publishing, Inc. ISBN 0898692113. Retrieved 3 November 2012.
- The American Heritage Dictionary of the English Language, Fourth Edition Copyright, Houghton Mifflin Company.
- Gibson, Henry (Reverand (sic)) (1882), Catechism Made Easy: Being a Familiar Explanation of the Catechism of Christian Doctrine, No. 2, 2nd edition, Vol. 1, Chapter 5, in the subpart "The First Commandment (Concluded)", "Twenty-Fifth Instruction", p. 310, Burns and Oates (publisher), London, 1882.
- Notes and Queries, Volume 6 July–December 1852, London, page 252
- The Archaeological journal (UK), Volume 7, 1850 page 413
- Alban Butler, 2000 Lives of the Saints ISBN 0-86012-256-5 page 84
- Duke, AC "Calvinism in Europe, 1540-1610, A collection of Documents" P. 53.