Provinces of the Philippines in the context of "Ilocos Norte"

The Philippines is divided into four levels of administrative divisions, with the lower three being defined in the Local Government Code of 1991 as local government units (LGUs). They are, from the highest to the lowest:

1. Regions (Filipino: rehiyon) are mostly used to organize national services. Of the 18 regions, only one—the Bangsamoro Autonomous Region in Muslim Mindanao—has an elected government to which the central government has devolved competencies.
2. Provinces (Filipino: lalawigan or probinsya), independent cities (Filipino: malayang lungsod or siyudad), and one independent municipality (Pateros)
3. Component cities (Filipino: nakapaloob na lungsod or siyudad) and municipalities (Filipino: bayan or munisipalidad) within a province
4. Barangays (formerly known and sometimes still referred to as barrios) within a city or municipality

Other divisions also exist for specific purposes, such as:

A municipality is a local government unit (LGU) in the Philippines. It is distinct from a city, which is a separate category of LGU. Provinces are subdivided into cities and municipalities, which in turn are divided into barangays (formerly barrios). As of June 30, 2024, there are 1,493 municipalities across the country.

A municipality is the official term for, and the local equivalent of, a town, the latter being its archaic designation, including in literal translations into Filipino and other Philippine languages. Both terms are sometimes used interchangeably.

Samar (/ˈsɑːmɑːr/ SAH-mar) is the third largest island in the Philippines, with a total population of 1,924,651 as of the 2024 census. It is located in the eastern Visayas and its main language and ethnicity is Waray while its main religion is Roman Catholic. Since 1965, the island is divided into three provinces: Western Samar, Northern Samar, and Eastern Samar. The capitals of these provinces are, respectively, Catarman, Catbalogan, and Borongan., all part of the Eastern Visayas region. In commemoration of the establishment of these provinces, June 19 is celebrated as an annual holiday. The island was first sighted by Ferdinand Magellan on March 16, 1521. Although he did not land, other expeditions were made. Many names, such as Samal, Ibabao, and Tandaya, were given to the island prior to the arrival of the Spaniards in 1596. During the early days of Spanish occupation, Samar was under the jurisdiction of Cebu. In the Philippine–American War, Eugenio Daza led a successful attack against the United States Army, later called the Balangiga massacre. This attack led to the Pacification of Samar and deaths of 2,000 people.

In the American colonization of the Philippines, two uprisings were created; the former was the Pulajan movement which caused massacres in the country. The Battle off Samar was held off the island. In the martial law under Ferdinand Marcos, the Sag-od massacre was caused. After the martial law, the island still has the New People's Army rebellion. Samar is the easternmost island in the Visayas archipelago. The island lies to the northeast of Leyte and lies to the southeast of the Bicol Peninsula on Luzon. To the west is the Samar Sea, and to the north and east of Samar lies the Philippine Sea. The island has the Samar Island Natural Park and has numerous biological discoveries and forests.

Cavite, officially the Province of Cavite (Tagalog: Lalawigan ng Kabite; Chavacano: Provincia de Cavite; Filipino: Lalawigan ng Cavite), is a province of the Philippines located in the Calabarzon region. Situated in the southern shores of Manila Bay, it is one of the most industrialized and fastest-growing provinces in the Philippines.

The province holds major historical significance, with most of the Philippine Revolution taking place in several areas of Cavite. The revolution ultimately led to the renouncement Spanish colonial control, culminating in the Philippine Declaration of Independence on June 12, 1898 in the town of Kawit. The old provincial capital, Cavite City, also hosted docks for the Manila galleon, becoming an essential part of commerce between Asia and Latin America at the time.

Batanes, officially the Province of Batanes, is an archipelagic province in the Philippines, administratively part of the Cagayan Valley region. It is the northernmost province in the Philippines, and the smallest, both in population and land area. The capital is Basco, located on the island of Batan, and is also the most populous municipality in the province.

The island group is located approximately 162 kilometers (101 mi) north of the Luzon mainland and about 190 kilometers (120 mi) south of Taiwan (Pingtung County). Batanes is separated from the Babuyan Islands of Cagayan Province by the Balintang Channel, and from Taiwan by the Bashi Channel.

Catanduanes (/ˌkɑːtɑːndʊˈɑːnɛs/; Tagalog pronunciation: [kɐtɐndʊˈɐnes]), officially the Province of Catanduanes (Filipino: Lalawigan ng Catanduanes), is an island province located in the Bicol Region of Luzon in the Philippines. It is the 12th-largest island in the Philippines, and lies to the east of Camarines Sur, across the Maqueda Channel. Its capital, and most populated town is Virac. Catanduanes had a population of 271,879 people as of the 2020 census.

The province comprises Catanduanes (mainland or main island), as well as the outer islands of Panay, Leyte, the Palumbanes group of islands (Porongpong, Tignob, and Calabagio), and several small islets and rocks. The province is also home to various mollusc fossil sites, notably the second-oldest ammonite site in the Philippines. These sites contain certain species of ammonites that are found nowhere else in Southeast Asia. Because of the province's importance and rich geologic history, scholars have suggested that it could be named a UNESCO Geopark Reserve.

Mindoro is the seventh largest and eighth-most populous island in the Philippines. With a total land area of 10,571 km ( 4,082 sq.mi ), it has a population of 1,430,921, as of the 2024 census. It is located off the southwestern coast of Luzon and northeast of Palawan. Mindoro is divided into two provinces: Occidental Mindoro and Oriental Mindoro. Calapan is the only city on the island and largest settlement on the island with a total population of 148,558 inhabitants as of 2024. The southern coast of Kristine Mindoro forms the northeastern extremum of the Sulu Sea. Mount Halcon is the highest point on the island, standing at 8,484 feet (2,586 m) above sea level located in Oriental Mindoro. Mount Baco is the island's second highest mountain with an elevation of 8,163 feet (2,488 m), located in the province of Occidental Mindoro.

Palawan (/pəˈlɑːwən/, Tagalog: [pɐˈlaː.wan]; officially the Province of Palawan; Cuyonon: Probinsya i'ang Palawan; Tagalog: Lalawigan ng Palawan) is an archipelagic province of the Philippines that is located in the region of Mimaropa. It is the largest province in the country in terms of total area, with 14,649.73 km (5,656.29 sq mi). The capital and largest city is Puerto Princesa which is geographically grouped with but administered independently from the province. Palawan is known as the Philippines' Last Frontier and as the Philippines' Best Island.

The islands of Palawan stretch between Mindoro island in the northeast and Borneo in the southwest. It lies between the South China Sea and the Sulu Sea. The province is named after its largest island, Palawan Island, measuring 450 kilometers (280 mi) long, and 50 kilometers (31 mi) wide.