The Archdiocese of Nueva Segovia is an archdiocese of the Catholic Church in the Philippines. It covers the province of Ilocos Sur, on the island of Luzon. The see of the archdiocese is the city of Vigan.

The archdiocese was erected in 1595 in the city of Nueva Segovia (modern-day Lal-lo, Cagayan). The see was moved in 1758 to Vigan because of its relative distance, at the request of Bishop Juan de la Fuente Yepes, during the pontificate of Benedict XIV. It became an archdiocese in 1951.

The archdiocese features the only archbishop's residence in the Philippines built during the Spanish era. It is located just beside the Vigan Cathedral. The rear of the convent also had an access to nearby Govantes Dike, apparently a convenient exit point by sea, but it is no longer in use as the dike is no longer navigable. Both the archbishop's residence and the cathedral itself remains to be one of the greatest contributions of the Order of Augustinian Recollects in the Philippines.

The archdiocese also operates its own radio station, dzNS ("NS" meaning "New Sound" and "Nueva Segovia"), which is a member of the Catholic Media Network.

The archdiocese also operates a weekly newspaper, Timek ti Amianan (Ilocano: "Voice of the North").

The Diocese of Nueva Segovia was established together with Cebu and Nueva Cáceres by Pope Clement VIII on August 14, 1595, by virtue of the papal bull Super Specula Militantis Ecclesia under the patronage of the Immaculate Conception. Its first bishop was Miguel de Benavides. The ecclesiastical jurisdiction extended to the provinces of Ilocos Norte, Ilocos Sur, Abra, La Union, Pangasinan, Cagayan, Isabela, Nueva Vizcaya, Batanes, Mountain Province and five northern towns of Tarlac.

Although Vigan was the oldest town created by the Spaniards in the north, it was not made the seat of the diocese which was created for Northern Luzon since the preferred locale, Nueva Segovia, a city at the mouth of the Ibanag River in Cagayan, was by then already a flourishing Spanish settlement while Vigan was then only a pueblo, a town. Eventually however, the city of Nueva Segovia was gradually effaced by the floods of the Rio Grande, and the seat was provisionally transferred to the nearby town of Lal-lo, Cagayan. On September 7, 1758, the seat was permanently transferred to Vigan, retaining the old name, up to the present. The transfer was made at the request of the bishop Juan de la Fuente Yepes during the pontificate of Benedict XIV. The year 2008 marks the 250th year since the transfer.

Nueva Segovia was elevated to an archdiocese, separated from Manila on June 29, 1951, by virtue of the papal bull Quo in Philippina Republica of Pope Pius XII. As the other local churches matured, there was eventual weaning from the archdiocese. Presently, it covers the civil province of Ilocos Sur, with the Dioceses of Laoag, Bangued and Baguio, and the Vicariate of Bontoc-Lagawe as suffragans. Santiago C. Sancho was the first archbishop of the newly elevated metropolitan church. Since Sancho, there had been five other Ordinaries of Nueva Segovia – Archbishops Juan C. Sison, Jose T. Sanchez, Orlando B. Quevedo, Edmundo M. Abaya, Ernesto A. Salgado and currently, Marlo Mendoza Peralta who is 37th bishop and 7th archbishop.

The archdiocese maintains a complex of mass communications media – an AM radio station, DzNS (963 kHz) founded in 1968; a weekly newspaper, Timek ti Amianan founded in 1983; and a printing press, the Imprenta Nueva Segovia founded in 1995.

In December 2018, the Nueva Segovia Archdiocesan Archives known as Archivo Nueva Segovia (ANS) was declared a national cultural treasure by the National Archives of the Philippines becoming one of only three archives, including the National Archives and the University of Santo Tomas Archives, to be given the distinction. The archives was established in the early 1990s by Archbishop Orlando Quevedo.

The sword and the book are symbols of Paul the Apostle, patron saint of the cathedral at Vigan. The sword was the instrument of his martyrdom, the book stands for the gospel which he preached as an apostle. The inscription Gladius Spiritus (Sword of the Spirit) is taken from his epistle to the Ephesians (6:17): "Make the helmet of salvation your own, and the sword of the Spirit, God's word." The red background stands for his burning zeal for souls and for his martyrdom.

The snaky figure in silver that traverses the bottom of the field represents the Abra river on the north bank of which is the seat of the archdiocese of Nueva Segovia.

The popular name of the seat of Nueva Segovia is Vigan which derived its name from the Ilocano word "bigaan," a contraction of 'cabigaan' meaning where the 'biga' abounds, a plant of the taro family but bigger than the taro and with bigger tubers; hence its scientific name Alocasia macrorhiza meaning an alocasia with big root.

• Miguel de Benavides, 1595–1602
• Diego Soria, 1602–1613
• Miguel García Serrano, 1616–1618
• Juan Rentería, 1618–1626
• Hernando Guerrero, 1627–1634
• Diego Aduarte, 1634–1636
• Fernando Montero Espinosa, 1639–1646
• Rodrigo Cárdenas, 1650–1661
• José Millán de Poblete, 1675, died as Bishop-elect
• Francisco Pizaro de Orellana, 1680–1683
• Diego de Gorospe e Irala, 1699–1715
• Pedro Mejorada, 1717–1719
• Jeronimo Herrera y Lopez, 1724–1742
• Manuel del Rio Flores, 1744–1745
• Juan de Arechederra, 1750–1751
• Juan de La Fuente Yepes, 1753–1757
• Bernardo de Ustariz, 1763–1764
• Miguel García San Esteban, 1768–1779
• Juan García Ruiz, 1784–1796
• Agustín Pedro Blaquier, 1801–1803
• Cayetano Pallás, 1806–1814
• Francisco Albán Barreiro, 1817–1837
• Rafael Masoliver, 1846–1846
• Vicente Barreiro y Pérez, 1848–1856
• Juan José Aragonés, 1865–1872
• Mariano Cuartero y Sierra, 1874–1887
• José Hevía y Campomanes, 1889–1903
• Dennis Joseph Dougherty, 1903–1908
• James Jordan Carroll, 1908–1912
• Peter Joseph Hurth, 1913–1926
• Santiago Caragnan Sancho, 1927–1951, bishop until June 29, 1951

Archbishop			Period in Office	Coat of Arms
1.		Santiago Caragnan Sancho	1951–1966
2.		Juan Callanta Sison	1966–1981
3.		Jose Tomas Sanchez	1982–1986
4.		Orlando Beltran Quevedo	1986–1998
5.		Edmundo Abaya	1999–2005
6.		Ernesto Antolin Salgado	2005–2013
7.		Marlo Mendoza Peralta	2014 - Present

• Diocese of Baguio
• Diocese of Bangued
• Diocese of Laoag

• 
  Conversion of Saint Augustine Parish, Bantay
• 
  Minor Basilica of Saint Nicholas of Tolentine, Sinait
• 
  Saint William the Hermit Parish, Magsingal
• 
  Archdiocesan Shrine of Our Lady of the Assumption, Santa Maria
• 
  Archdiocesan Shrine of Saint Vincent Ferrer, San Vicente
• 
  Archdiocesan Shrine of Saint Lucy the Martyr, Santa Lucia

• Catholic Church in the Philippines
• List of Catholic dioceses in the Philippines
• List of Catholic archdioceses

• Media related to Roman Catholic Archdiocese of Nueva Segovia at Wikimedia Commons

• http://www.newadvent.org/cathen/11149b.htm
• http://www.cbcponline.org/jurisdictions/nueva_segovia.html

17°34′29″N 120°23′20″E / 17.5748°N 120.3890°E / 17.5748; 120.3890