Iba , officially the Municipality of Iba (; ; ), is a municipality and capital of the province of Zambales, Philippines. According to the , it has a population of people.
The town is also known as the birthplace of Ramon Magsaysay, the 7th President of the Philippines.
The municipality was named after the tree Phyllanthus acidus, which bears edible sour fruits. It is locally known as iba, a name which also applies to the similar kamias (Averrhoa bilimbi).
Iba was founded by the Order of Augustinian Recollect priests led by Rodrigo de San Miguel in 1611 as the village of Paynauen. The early inhabitants of the town are called Zambals. They were later joined by the Tagalogs and Ilocanos who migrated to the town, which resulted in the intermingling of customs and traditions. The Aeta people settled in the hinterlands and the majority of them dwelled in the Mount Pinatubo area. In 1860, the administration of the town was turned over to the Dominican priests until the civil government came to power. There are no available records as to when Paynauen was renamed Iba.
The permanent capital of Zambales was moved from Masinloc to Iba because of its strategic location being on the central part of Zambales. On August 28, 1901, American Civil Governor William Howard Taft held the historic session of the Second Philippine Commission at the Roman Catholic Church of Iba and established the Province of Zambales under American rule.
The municipality of Iba is bounded by the municipalities of Botolan to the south, Palauig to the north, the province of Tarlac to the east, and the South China Sea to the west. Like most of the municipalities in the province, Iba is geographically bound by the coast in the west with the Zambales Mountains in the eastern portion of the municipality.
As the capital of the province, it is second largest provincial capital in terms of land area in Central Luzon Region after Tarlac City.
Iba is from Olongapo and from Manila.
Iba is politically subdivided into 14 barangays, as indicated below. Each barangay consists of puroks and some have sitios.
There are 9 barangays which are considered urban (highlighted in bold) while the rest are considered rural.
Iba has a tropical monsoon climate (Köppen climate classification Am). Iba's climate is no different from the other towns where rainy season begins from May and ends in October, while the dry season is from November to April. An average of of annual rainfall with a temperature of is observed during rainy season. The highest temperature recorded is while the lowest is .
In the 2024 census, the population of Iba was 59,580 people, with a density of .
The population of Iba has become a mixture of different people over the last twenty years as opportunities in employment and business attracted people from Pangasinan, Bataan, and Batangas.
Originally, the population was composed of Sambal and Ilocano-speaking people. While Sambal and Ilocano are spoken by many of the population, Tagalog has become the common language spoken in Iba. Sambal residents have switched their language from Sambal to Ilocano and Tagalog.
The majority of the people in Iba, Zambales are Roman Catholics second was the Aglipayan Church, The largest minority religion is Iglesia ni Cristo followed by various Protestant denominations.
The seat of the Ecclesiastical District of Zambales North of the Iglesia ni Cristo is located in Iba. The INC district administration and district office oversees several locales and extensions from different municipalities in the northern part of Zambales province.
The Cathedral of Iba, also known as the Cathedral of Saint Augustine, is the seat of the Roman Catholic Diocese of Iba. The church of the diocese is a 17th-century Baroque church built by the Augustinian Recollects. It is located adjacent to the Provincial Capitol Building. Currently, the appointed bishop is Bishop Bartolome G. Santos Jr. since Bishop Florentino Lavarias became the Archbishop of San Fernando, Pampanga.
The population of Iba increases during daytime because of traders, market buyers, students, government and private employees flocking into town. There are currently two malls in the municipality, Iba Town Center Mall - the first community mall in the town, and City Supermarket, Inc. (CSI Mall). Happy Go Shopping Center is also a major shopping destination in town, with Robinsons Place Iba and WalterMart Iba being planned. Several supermarket chains including have branches in Iba. Some national government offices can also be found in Iba, such as the SSS, NBI and PhilHealth.
With a continuously growing number of commercial establishments, banks, and financial institutions in Iba, it contends among the most competitive municipalities in Philippines, and is pushing forward towards a progressive city.
Tourism is one of the major economic activity in Iba during the summer period. It has become a popular destination for summer vacationists and tourists due to the pristine and beautiful beaches that line the shorelines of Iba, and adventure trekking to the unique 3-series of Iba waterfalls. Its pollution-free beaches due to the absence of industrial-polluting activities in the locality, make it one of the best places in the Philippines.
In response to the growing number of both local and foreign visitors, investments in beach resorts have increased in the last fifteen years. Today there are about 50 beach resorts in Iba.
The provincial government administers the President Ramon Magsaysay Memorial Hospital in Bargy. Palanginan to provide convenient medical services at a lower costs to the people of the Zambales. The hospital received a â±50-million equipment upgrade in 2011 to better serve its patients.
The municipal government operates a Super Health Center in Brgy. Bangantalinga to improve the local healthcare system to provide adequate support in preventing diseases and early treatment of illnesses.
The Santa Cecilia Medical Center is a private institution offering one of the most complete and advance medical facilities in the province.
Saint Pio's Medical Center is also a large medical facility and a private institution located along Govic Highway in Brgy. Dirita.
The Iba Schools District Office governs all educational institutions within the municipality. It oversees the management and operations of all private and public, from primary to secondary schools.
Elected officials (2025-2028):