Ilocos Sur (lit. 'South Ilocos'), officially the Province of Ilocos Sur (Ilocano: Probinsia ti Ilocos Sur; Tagalog: Lalawigan ng Ilocos Sur), is a province in the Philippines located in the Ilocos Region in Luzon. Located on the mouth of the Mestizo River is the capital of Vigan, while Candon is the most-populous city. Ilocos Sur is bordered by Ilocos Norte and Abra to the north, Mountain Province to the east, La Union and Benguet to the south and the South China Sea to the west.
Ilocos Sur was established in 1818 when the province of Ilocos was split into two: the north (now Ilocos Norte) and the south (Ilocos Sur). At that time, it included parts of Abra and the upper half of present-day La Unión. The current boundaries of the province set in March 1917 by virtue of Act No. 2683.
The province is home to two UNESCO World Heritage Sites, namely, the Heritage City of Vigan and the Santa Maria Basilica Shrine.
Contents
History
Early history
Before the arrival of the Spanish, the coastal plains in northwest Luzón from Bangui in the north to Namacpacan in the south were part of a region called the Ylokos. It lies between the South China Sea in the west and the Northern Cordilleras in the east. On the western side, the land is sandy; while on the eastern side (near the mountains that separate the region from the Mountain Province) the land is rocky. This left a narrow strip of plains for cultivation. The mountains come so close to the sea that the highway is carved into them. The pressure of an increasing population and the need for land made the people thrifty, and they built their villages near small bays and coves called looc in the local dialect. These coastal inhabitants were known as Ylocos, which means "from the lowlands". The region was then called by the ancient name Samtoy, from sao mi ditoy ("our language" in Ilocano).
Spanish colonial era
The Ilocos region was a thriving and fairly advanced cluster of towns and settlements familiar to Chinese, Japanese, and Malay traders when the Spanish explorer Juan de Salcedo arrived in Vigan on June 13, 1572. The Spanish made Cabigbigaan their headquarters, which Salcedo called Villa Fernandina. It also became known as the Intramuros de Ilocandia. Salcedo declared all of Northern Luzón an encomienda (land grant). He was the encomendero of Vigan and lieutenant governor of Ylokos until his death in July 1574.
Augustinian missionaries evangelized the region, establishing parishes and building churches that still stand. Three centuries later, Vigan became the seat of the Archdiocese of Nueva Segovia.
The coast of Samtoy was known to the Spanish colonizers in 1572, when Juan de Salcedo traveled along it. Sent by Miguel López de Legazpi to explore the island of Luzón, Salcedo founded Ciudad Fernandina in 1574 in Bigan, in present-day Ilocos Sur. It became the center of Spanish rule and influence, including the evangelization and pacification movements. Due to Salcedo's efforts, the settlements in Tagurín, Santa Lucía, Nalbacán, Bantay, Candón and Sinayt were pacified and paid tribute to the King of Spain.
According to the Spanish chronicler Pigafetta, "The Ilocos are all Christians and are the humblest and most tractable". The Augustinians established parishes in Santa in 1576, Tagurín in 1586, Santa Lucía in 1586, Nalbacán in 1587, Candón in 1591, and Bantay in 1590. They built a church in Bigan in 1641 which later became the Cathedral of the Episcopal See of Nueva Segovia after 117 years.
Ylokos consisted of the present-day provinces of Ilocos Norte, Ilocos Sur, Abra and part of Mountain Province. A royal decree of February 2, 1818 separated Ilocos Norte from Ilocos Sur, the latter including northern La Union (as far as Namacpacan, present-day Luna) and present-day Abra. The sub-provinces of Lepanto and Amburayan in Mountain Province were annexed by Ilocos Sur.
At the same year as 1818, the census declared that there were 61,897 tributaries-families, and of which, 530 tribute-families were Spanish-Filipinos and 14 were newly Christianised Chinese-Filipinos Of which, the number of Spanish-Families and their residences are as follows: 86 (Santo Domingo), 10 (San Vicente Ferrer) and 421 (Vigan).
American invasion
Under the Americans, a civil government was established in Ilocos Sur on September 1, 1901. Mena Crisólogo, a delegate to the Malolos Congress, was the first provincial governor.
Japanese occupation
On December 10, 1941, a contingent of Japanese Imperial forces landed in Mindoro, Vigan, Santa, Pandan and Caoayan. In Cervantes, the Battle of Bessang Pass was fought between Tomoyuki Yamashita's forces and the U.S. 21st Infantry; it was the greatest victory by Filipino guerrillas over the Japanese Imperial Army in World War II. The guerrillas mounted a series of attacks that lasted for almost six months in early 1945.
Marcos era
Much of the history of Ilocos Sur during the 21 years of the Marcos dictatorship are not well-documented, with the most prominent portrayals of Ilocos Sur history preferring to skip from the years immediately after Philippine independence in the 1940s, jumping straight to contemporary times.
In Ilocos Sur, the most prominent protests and incidents of the Marcos era – such as the infamous "Bantay incident: and the assassination of Reoresentative Floro Crisologo - actually took place before the declaration of martial law in 1972, and involved the Marcos administration's support for local strongmen rather than national controversies.
Organizations such as the Federation of Free Farmers (FFF) and Federation of Free Workers (FFW), sometimes supported by progressive elements of the Catholic Church, continued to fight for the labor rights of the poor until the 1972 declaration of Martial law made it illegal to peaceful protests.
Some of the frustrated protesters then opted to pursue an armed resistance against the dictatorship, many of whom only returned to peaceful life after the Marcoses were finally deposed by the civilian-led People Power revolution of 1986.
There were numerous human rights violations documented in Ilocos Sur in connection to the Marcos martial law era, and there was at least one camp in the province that held political Prisoners during the Marcos era - a "Camp Diego Silang", which is different from the Police Camp established in La Union in 1989.
Marcos' victory in the 1965 Presidential Elections had required that he gain political control of the north as a solid voting block, which meant forming alliances with the most prominent local "warlords" of the time - Ilocos Norte 1st District Representative Antonio Raquiza whom Marcos would later appoint as Secretary of Public Works and Highways; La Union 2nd District Representative Manuel T. Cases; and Ilocos Sur 1st District Representative Floro Singson Crisologo. Crisologo's cousin, Captain Fabian Ver of the Philippine Constabulary's Criminal Investigation Service, became part of Marcos' inner circle and eventually became one of Marcos' most trusted lieutenants. Historian Alfred McCoy noted in a 2017 article that "The Crisologos were one of the political families that was buoyed by the rise of Marcos to power, and that they were able to dominate their political rivals in Ilocos Sur as Marcos solidified his hold on power. McCoy also noted that Crisologo created a private army, which residents called the saka-saka, which literally means "barefooted" in Ilocano; controlled electoral offices; and used blockades to create a monopoly on the tobacco that came out of the province.
Contemporary history
When the People Power Revolution which ended on February 25, 1986 deposed Ferdinand Marcos from power, and installed Corazon Aquino as the new president of the Philippines, a provisional revolutionary government was set up in the country, and newspaper publisher Jose G. Burgos Jr. was appointed OIC Governor until a new constitution could be ratified and new officials elected.
Executive Order No. 12 and Executive Order No. 13, were issued on March 12 and 13, 2020, respectively, mandating the suspension of classes at all levels from March 13 to April 12, 2020, as well as the suspension of other school activities that involve the gathering of crowds, at both public and private schools in the province. On March 15, the province was placed under community quarantine through Executive Order No. 14 which restricted the movement of people to and from Ilocos Sur, mandated the establishment of checkpoints and conditions for transportation and travel, prohibited social gatherings, encouraged flexible/alternative work arrangements or suspension of work, suspended tourism, prohibited hoarding, delineated rules for business establishments, and imposed a curfew.
After the approval of "uniform travel protocols for land, air, and sea of the Department of the Interior and Local Government, crafted in close coordination with the Union of Local Authorities of the Philippines, League of Provinces of the Philippines, League of Municipalities of the Philippines, and the League of Cities of the Philippines," in Resolution No. 101, Series of 2021, Ilocos Sur Governor Ryan Luis V. Singson issued Executive Order No. 22, Series of 2021, mandating the travel protocols for implementation in the province. The resolution institutionalized the use of the System Safe, Swift, and Smart Passage (S-PaSS) Travel Management System, and the executive order eliminated the mandatory testing requirement for persons in specific traveler classifications who seek to enter or pass through the province.
Ilocos Sur was severely affected by the 2022 Luzon earthquake, which was felt strongly in Ilocos Sur for 30 seconds or longer. A total of 32 towns and two cities received damage, with the heaviest in Vigan. Nearly 100 homes were heavily damaged. Heritage sites in the UNESCO World Heritage City of Vigan were damaged, including the Vigan Cathedral and old-century houses, as well as few toppled power lines along Calle Crisologo. Parts of the old historic belfry of Bantay Church in the town of the same name also suffered severe damage.
Geography
Ilocos Sur occupies the central section of the Ilocos Region in northern Luzon. It is bordered by Ilocos Norte to the north, Abra to the northeast, Mountain Province to the east, Benguet to the southeast, La Union to the south, and the South China Sea to the west. Its area of 2,596.00 square kilometres (1,002.32 sq mi) occupies about 20% of the total land area of Region 1. The topography of Ilocos Sur ranges from 10 to 1,700 metres (33 to 5,577 ft) above sea level.
Climate
The climate is generally dry as defined by the Hernandez climate classification—the dry months are from October to May. The southernmost portion in Cervantes is wet with rain evenly distributed throughout the year while the southeastern part of Sugpon receives less precipitation. The rainy season arrives in August while January and February have the lowest precipitation. The mean temperature in the province is 27 °C (81 °F). January is the coldest.
Administrative divisions
Ilocos Sur comprises 32 municipalities and 2 component cities, which are organized into two legislative districts. There are a total of 768 barangays in the province.
Barangays
The 32 municipalities and 2 cities of the province comprise a total of 768 barangays, with Puro in Magsingal as the most populous in 2010, and Montero in Banayoyo as the least.
Demographics
According to the 2020 census, it has a population of 706,009 people, with a density of 270 inhabitants per square kilometre or 700 inhabitants per square mile.
The 1960 census lists 338,058 people; 64,446 dwelling units of which 2,974 are lighted with electricity; 3227 provided with radio; 7379 served with pipe water; 25,137 served with artesian and pumped water; and 310 using electricity, kerosene and gas for cooking.
Inhabitants
Ilocos Sur is inhabited mostly by Ilocanos belonging to the third largest ethnic group of Austronesian origin. A Spanish chronicler wrote that "the people are very simple, domestic and peaceful, large of body and very strong. "They are highly civilized. They are a most clean race, especially the women in their homes which they keep very neat and clean."
Miguel de Loarca records around 1582 that the Ilocanos are intelligent as the Zambaleños for they are farmers. The main occupation of the people is agriculture.
Father Juan de Medina noted in 1630 that the natives are 'the humblest and most tractable known and lived in nest and large settlements'.
Language
Ilocano is the main language of the native majority in the province, with neighboring La Union recognized it as an official language since 2012. It became widespread in neighboring regions of Cagayan Valley (Region II), Cordillera Administrative Region and major parts of Central Luzon (Region III)—where Ilocanos settled—as a lingua franca among respective Ilocano and non-Ilocano residents. Ilocano is also recognized as a minority language in Mindoro, Palawan and Mindanao (particularly in some areas in Soccsksargen), where Ilocanos had have been significant residents since the early 20th century. It is a third most widely spoken language in the Philippines, estimating 11 million speakers as of 2022. The language has many speakers overseas, including the American states of California and Hawaii. Filipino/Tagalog and English are also spoken and understood in the region, utilized in business, education and media.
Religion
The province is predominantly Roman Catholic with 75% of population adherence. Aglipayan Church is also a considerable a minority with a 5% adherence. Other religious beliefs are represented by other Christian Churches such as Baptist and Iglesia ni Cristo wherein the largest minority has 80 plus lokal or kapilyas and barangay chapels built in the province with 8% adherence as of the mid year 2024 the church has 2 subdivided districts(Candon City and Ilocos Sur In Northern portion) in the province, Methodist, Seventh-day Adventist, and other Evangelical Christians, as well as Muslims.
Economy
Economic indicators
Ilocos Sur's economy surged by 5.6% in 2024 to ₱103.22 billion, driven by a strong 58.6% services sector (tourism, retail) and 27.2% industry, making it the second-fastest-growing province in the Ilocos region. Key indicators include 15.3% agriculture, significant growth in food services (23.1%), and a 1st income class status.
Products and industries
The people are engaged in farming, producing food crops, mostly rice, corn, vegetable, root crops, and fruits. Non-food crops include tobacco, cotton, and tigergrass. Cottage industries include loom weaving, furniture making, jewelry making, ceramics, blacksmithing, and food processing.
Agriculture
Ilocos Sur's economy is agrarian, but its 2,647 square kilometres (1,022 sq mi) of unfertile land is not enough to support a population of 338,579.
Agricultural crops such as rice, corn tobacco and fruit trees dominate their farm industries. Secondary crops are camote and cassava, sugar cane and onions.
The rapidly growing population, the decreasing fertility of the soil, and the long period between the planting and harvesting season, have forced the people to turn to manufacture and trade. Many Ilocanos go to the Cagayán valley, Central Plains and Mindanao to sell Ilocano woven cloth.
Virginia leaf tobacco is still a premier cash crop, after a windfall brought about by the Tobacco Subsidy Law authored by Congressman Floro Crisologo in 1964, and later enhanced by the Republic Act No. 7171 authored by Congressman Luis "Chavit" Singson.
Weaving is the most extensive handicraft, once bolstered by the installation of the NDC Textile Mills in Narvacan which supplied the weavers with yarn.
Other industries are burnay and slipper making in Vigan, furniture, cabinet, and statue making in San Vicente, mortar and pestle making in San Esteban, and bolo making in Santa.
Infrastructure
Electricity
All municipalities in Ilocos Sur are electrified, courtesy of the Ilocos Sur Electric Cooperative (ISECO).
Education
Ilocos Sur has 547 public schools including five general high schools, one university, one agricultural college and 56 private schools, 16 of which are Catholic.
Notable schools in Ilocos Sur include St. Paul College of Ilocos Sur in Bantay (a historic Catholic institution with high passing rates), the Philippine Science High School Ilocos Region Campus in San Ildefonso, and the University of Northern Philippines in Vigan City. These institutions are recognized for their academic contributions to the region.
Culture
The Ilocos Sur Museum, founded on August 22, 1970, has a collection of cultural treasures which include art include paintings, centuries-old sculptures, pieces of carved furniture, and relics of Spanish European and Chinese cultures that had influenced Ilocano life for centuries.
Chapters of Philippine history and religion are found in the Crisólogo collections which includes family heirlooms, centuries –old "santos" (religious statuettes made of wood or ivory), other ivory images, Vienna furniture, marble-topped tables, ancient-carved beds, rare Chinese porcelains, jars and jarlettes, lamps, Muslim brass wares, and Spanish and Mexican coins.
The Syquia collections, including then President Elpidio Quirino's memorabilia, vie in quality with the Crisólogo collections. But in the midst of a fire scare in Vigan in the late 1908s and 1990s, the relics in the Syquia Mansion were transferred to Manila for safekeeping.
UNESCO Recognitions in Ilocos Sur
UNESCO has inscribed two Ilocos Sur sites in the World Heritage List.
Heritage City of Vigan
In 1999, the Heritage City of Vigan was inscribed in the World Heritage List. UNESCO describes the site as:
"Established in the 16th century, Vigan is the best-preserved example of a planned Spanish colonial town in Asia. Its architecture reflects the coming together of cultural elements from elsewhere in the Philippines, from China and from Europe, resulting in a culture and townscape that have no parallel anywhere in East and South-East Asia."
Santa Maria Basilica Shrine
In 1993, the Baroque Churches of the Philippines, containing 4 properties, was inscribed in the World Heritage List. One of the properties was the Santa Maria Church of Ilocos Sur. UNESCO describes, "[the] unique architectural style [of the churches] is a reinterpretation of European Baroque by Chinese and Philippine craftsmen."



