Los Baños
Municipality
Municipality of Los Baños
From top, left to right: Mount Makiling, Immaculate Conception Parish Church, Tadlac lake, Los Baños Museum, and UPLB main gate
Flag Seal
Etymology: lit: The Bath or The Bathing Place
Nickname(s):  Special Science and Nature City[1]
Map of Laguna with Los Baños highlighted
OpenStreetMap
Los Baños Location within the Philippines
Coordinates: 14°10′N 121°13′E / 14.17°N 121.22°E / 14.17; 121.22
Country	Philippines
Region	Calabarzon
Province	Laguna
District	2nd district
Founded	September 17, 1615
Barangays	14 (see Barangays)
Government  [2]
• Type	Sangguniang Bayan
• Mayor	Anthony F. Genuino (Bigkis)
• Vice Mayor	Josephine S. Evangelista (Bigkis)
• Representative	Ruth B. Mariano-Hernandez (PDP–Laban)
• Municipal Council	Members Leren Mae M. Bautista Marlo PJ A. Alipon Jonathan Bryan S. Siytiap Miko C. Pelegrino Mark Lester B. Dizon Julius A. Moliñawe Benedicto S. Alborida Mike Dexter A. Concio
• Electorate	71,941 voters (2022)
Area [3]
• Total	54.22 km2 (20.93 sq mi)
Elevation	118 m (387 ft)
Highest elevation	1,095 m (3,593 ft)
Lowest elevation	2 m (7 ft)
Population  (2020 census)[4]
• Total	115,353
• Density	2,100/km2 (5,500/sq mi)
• Households	32,017
Demonym	Los Bañense
Economy
• Income class	1st municipal income class
• Poverty incidence	7.46 % (2021)[5]
• Revenue	₱ 491.5 million (2022)
• Assets	₱ 1,243 million (2022)
• Expenditure	₱ 385 million (2022)
• Liabilities	₱ 278.8 million (2022)
Service provider
• Electricity	Manila Electric Company (Meralco)
Time zone	UTC+8 (PST)
ZIP code	4030, 4031
PSGC	043411000
IDD : area code	+63 (0)49
Native languages	Tagalog
Website	losbanos.gov.ph

Los Baños (IPA: [lɔs bɐˈɲɔs]), officially the Municipality of Los Baños (Tagalog: Bayan ng Los Baños), colloquialy 'elbi' or simply LB, is a municipality in the province of Laguna, Philippines. According to the 2020 census, it has a population of 115,353 people.^[4]

It has a total land area of 56.5 square kilometers (21.8 sq mi) and is bordered on the south and south-west by Mount Makiling and Santo Tomas in Batangas, on the north by Laguna de Bay, on the north-west by Calamba and on the east by the town of Bay. The town is located 63 kilometers (39 mi) southeast of Manila and is easily accessible via the South Luzon Expressway along with Manila South Road and Calamba–Pagsanjan Road.

The municipality lies on the northern slopes of the long dormant volcano Mount Makiling and is known among tourists for its hot spring resorts. Los Baños also hosts two constituent universities of the University of the Philippines System: the University of the Philippines Los Baños and University of the Philippines Open University, along with other foreign and local and international research centers, such as the International Rice Research Institute, the ASEAN Center for Biodiversity, the Philippine Rice Research Institute, Philippine Carabao Center, and the Southeast Asian Ministers of Education Organization-Southeast Asian Regional Center for Graduate Study and Research in Agriculture(SEAMEO-SEARCA) at UPLB making the town a temporary home for tens of thousands of both local and foreign undergraduate and graduate students, researchers and support staff.

Los Baños was declared as the Special Science and Nature City of the Philippines through Presidential Proclamation No. 349.^[6] The proclamation, however, does not convert the municipality to a city or give it corporate powers that are accorded to other cities.

Aside from its importance in academics, science and research, Los Baños is a well-known tourist destination. Because of the town's proximity to Metro Manila, Los Baños's hot spring resorts are frequent weekend or summer getaways for residents of the vast metropolis and tourists from other places in the Philippines and abroad. Tourists who visit Los Baños also come to the several native delicacies stores in the town to buy the town's famous buko pie (coconut meat pie) as well as a home-grown brand of chocolate cake.^[7][8] Currently, it is Laguna's richest municipality in terms of assets amounting to ₱652.95 million as of 2017.^[9]

Los Baños is derived from Spanish for "the baths", also referring to the hot springs. It was named as such in 1589 when Fr. Pedro Bautista built public baths in the present-day town.^[10]

Los Baños started as a settlement, a barrio of Bay called Mainit, the Tagalog term for "hot", alluding to the thermal springs at the foot of Mount Makiling. By 1589, through a Franciscan friar, it became popularly called by its present name, Los Baños.

In 1595, a temporary building made of bamboo and cogon was built to serve as shelter for the patients who journeyed to Mainit to seek cures for their ailments. It was on September 17, 1615, when the friars administered Los Baños as a separate town from Bay.^[10]

In 1671, more permanent structures like churches and hospitals were built only to be destroyed by a fire in 1727. The structures were re-erected at a slow rate. The church which now stands in the municipal center of Los Baños dates back to 1851. The Spanish Governor's palace was built in 1879 but was only completed in 1892.^[11]

This section needs expansion. You can help by adding to it. (January 2022)

In 1909, the University of the Philippines College of Agriculture (UPCA) was established.

The UPCA became a Japanese prisoner of war camp for nationals of the Allied countries, a target of Kempetai punitive measures, and the headquarters of a secret organization of guerrillas. On February 23, 1945, US forces of the First Battalion, 511th Parachute Infantry Regiment of the Eleventh Airborne Division led a combined amphibious and airborne raid against the prison camp, rescuing over 2,000 Allied nationals. They killed the 250-man Japanese garrison. In order to force the prisoners to leave behind their belongings and speed up the evacuation before the Japanese could send reinforcements, US forces and Filipino guerrillas burned the camp. Only Baker Hall, the university gymnasium until 2010, remained intact.^[12] General Yamashita, the most famous World War 2 General of the Japanese, was tried and executed for war crimes in Los Baños, Laguna.^[13]

In 1959, the 10th World Scout Jamboree was held in Los Baños, with the theme "Building Tomorrow Today" with an attendance of 12,203 Scouts.

The International Rice Research Institute (IRRI) was established in 1960 during the administration of President Carlos P. Garcia,^[14] and soon after President Diosdado Macapagal had started his term, IRRI had begun work on the development of the new “Miracle Rice” (IR8) variety, which would later increase Philippine rice production significantly.^[14]

The social unrest which arose when Ferdinand Marcos' debt-driven campaign spending led to the 1969 Philippine balance of payments crisis ^[15][16] spread beyond the capital and also triggered protests by students in UP Los Baños, most prominently in the form of a 13-day strike which saw barricades established at the UPLB Gate and Los Baños Highway Junction areas.^[17] This unrest coincided with another issue, which was the call for the UP College of Agriculture to become independent from the University of the Philippines in Diliman.^[17]

When martial law was declared in September 1972, Marcos cracked down on any form of criticism or activism, leading to the arrest of many of Los Baños residents. Among those who experienced arrest and torture during martial law were the UPLB Institute of Chemistry's Dr. Aloysious Baes, while among those who became desaparecidos were Tish Ladlad, Cristina Catalla, Gerardo "Gerry" Faustino, Rizalina Ilagan, UPLB Professor Jessica Sales, and PCARRD artist-illustrator Manny Ontong.^[18] Among those confirmed to have been martyred for their beliefs was Manuel Bautista, the student leader who had spearheaded the establishment of UPLB's Textbook Exchange and Rental Center (TERC).^[17][19]

In 1979, the evolution and development of academic excellence in Los Baños moved the people of Los Baños to request president Marcos to declare the municipality as "A Special University Zone", granted on June 15, 1982, by virtue of letter of instruction No. 883.

Los Baños was further declared as an "Agriculture, Forestry, and Life Sciences Community" on March 17, 1982, by virtue of Executive Order No. 784 (Section 23).^[20]

On August 7, 2000, Los Baños was declared a Special Science and Nature City of the Philippines by virtue of Presidential Proclamation No. 349. It was signed by then-President Joseph Estrada.^[6] The Proclamation is in recognition of the town's important contribution in country. The municipality has remained as the country's hub of science and nature with the presence of national and international research institutions collaborating towards the advancement of science research.^[21]

The 6th Flora Malesiana, a triennial gathering of people with botanical expertise regarding "Malesia", was held from September 20 to 24, 2004. It provided a forum for Flora Malesiana members and encouraged publications on Malesian plants.

During the 2005 Southeast Asian Games, Los Baños played host to the aquatics events, with the newly built Trace Aquatic Center at Trace College serving as the venue.

The headquarters of the Association of Southeast Asian Nations (ASEAN) Center for Biodiversity was opened on August 8, 2006, having leased office spaces until late 2010s from the DENR-Ecosystems Research and Development Bureau, located at the College of Forestry, University of the Philippines Los Baños. It coincided with the foundation day celebrations of the organization. The Philippines assumed the Chairmanship of ASEAN in 2006 and played host to the 12th ASEAN and East Asia Summits (held in Metro Cebu, January 2007).

In January 2007, the 5th ASEAN Inter-Club Age-Group Swimming Championships was held in the Trace Aqua Sports Center.

Los Baños also plays host to the UAAP, as the Trace Aquatics Center has served as the venue for the league's swimming competitions since UAAP Season 70 until UAAP Season 76.

Currently, Los Baños is probably the densest habitat of academicians in South East Asia.^[22] Although it is a small town, it has contributed widely through scientific achievements and contributions locally and worldwide particularly on agriculture.^{[citation needed]}

On December 3, 2020, firing from outside the perimeter walls, its incumbent mayor Caesar P. Perez was assassinated inside the municipal office premises by an armed assailant,^[23] with a former opposition councilor suspected to be the mastermind.^[24]

Los Baños is nestled between two of Southern Luzon's most dominant geographical features – Mount Makiling to the south and south-west and Laguna de Bay to the north.^[25] In fact, Laguna de Bay's southernmost tip is at Barangay Bambang, and Barangay Bagong Silang is already halfway up Mount Makiling. Both the mountain and the lake are volcanic features – Makiling being a potentially active volcano whose geothermal activities gave birth to the hot springs after which the town was named, and Laguna de Bay being the filled-in caldera of a massive prehistoric volcano.

Another notable geological feature is Tadlac Lake, a maar lake whose almost perfectly round shape and uncharted waters have led some locals to call it "the enchanted lake". Others call it "alligator lake", a reminder that it served as the last bastion of Laguna de Bay's once-plentiful cayman population, which has since been wiped out and is now just another legendary part of Philippine history.

The town of Los Baños is crossed by five rivers or creeks:^[25]

• The Dampalit river, which is named after an edible herb, dampalit (Sesuvium portulacastrum), which often grows near river shores, originates on the north face of Mt. Makiling east of the Philippine High School for the Arts, and feeds into Laguna lake at the boundary of Barangays Lalakay and Bambang.^[25]
• The Saran creek, whose headwaters begin somewhere near the municipal dumpsite, flows through Barangay Anos near the municipal cemetery, and feeds into the lake at Barangay Malinta.
• The Pele creek, named after the pili tree (Canarium ovatum), flows through the west side of Barangay Batong Malake and has its mouth at the boundary of Barangays Malinta and Mayondon.^[25]
• The Molawin River, most familiar to UPLB students because it flows through the UPLB campus and the Makiling Botanic Gardens, is named after the Molave tree (Vitex parviflora).
• The Maitim river, whose name means "black", flows through the westernmost portions of Los Baños, marking the town's boundary with its neighboring town of Bay. The Molawin and Maitim rivers merge just a few meters before feeding into Laguna de Bay at the shore of Barangay Maahas.^[25]

Los Baños has a tropical monsoon climate (Köppen climate classification Am).

Los Baños is politically subdivided into 14 barangays. Each barangay consists of puroks and some have sitios.

In the 2020 census, the population of Los Baños was 115,353 people,^[4] with a density of 2,100 inhabitants per square kilometer or 5,400 inhabitants per square mile.

Like other LGUs in Laguna, the town holds election every three years, which will cover from Mayor, Vice Mayor, and up to the councilors.

Poverty incidence of Los Baños

• University of the Philippines Los Baños and other places of interest within its administered area
  • Mount Makiling
    • Makiling Botanic Gardens
    • ASEAN Center for Biodiversity
    • UPLB Museum of Natural History
    • Flatrocks – creek usually frequented by hikers
    • Mudspring – Presumed volcanic crater of Mt. Makiling
    • Peak 2 – Highest peak of Mt. Makiling
    • Pook ni Maria Makiling, an eco-tourism site adjacent to the Jamboree Site, National Arts Center, and U.P. Los Baños
    • Boy Scouts of the Philippines and Jamboree Site – a campsite at the foot of Mount Makiling adjacent to U.P. Los Baños, which is being managed by the Boy Scouts of the Philippines and the site of the 10th World Scout Jamboree in 1959, the 1st and 12th Asia Pacific Jamboree in 1973 and 1991, and the 1st ASEAN Jamboree in 1993.
    • National Arts Center – a patch of land at the foot of Mount Makiling adjacent to U.P. Los Baños, which is being managed by the Cultural Center of the Philippines and the site of the Philippine High School for the Arts, a special school for young artist scholars.
  • International Rice Research Institute

    

  • Philippine Rice Research Institute
  • Dairy Training & Research Institute
  • Philippine Carabao Center at UPLB (PCC at UPLB) – conducts R&D in water buffalo; implements other programs related to water buffalo development; one of the 13 regional centers of PCC (see the link below)
  • Agricultural and Life Sciences Complex
    • National Institute of Molecular Biology and Biotechnology (NIMBB/BIOTECH) – UPLB
    • Institute of Plant Breeding
    • APEC Center for Technology Exchange and Training for Small and Medium Enterprises (ACTETSME)
    • National Crop Protection Center (NCPC)
    • College of Agriculture AgriPark
  • Baker Hall (also known as Los Baños Internment Camp during World War II)
• University of the Philippines Open University

  

• Philippine Council for Agriculture, Aquatic, and Natural Resources Research and Development (PCAARRD)
• Department of Science and Technology Regional Office for Region IV (DOST IV)
• Magnetic Hill
• Dampalit Falls
• Immaculate Conception Parish – a centuries-old church at the town proper (Poblacion/Bayan)

• 

  Paciano Rizal Shrine – house of Paciano Rizal, brother of National Hero Jose Rizal
• Paciano Rizal Park – park dedicated to Paciano Rizal, brother of National Hero Jose Rizal
• Trace Aqua Sports Complex and Museum – aquatic sports venue for the 2005 SEA Games and Philippine Olympic Festival
• Yamashita Shrine – execution site of Gen. Homma and Gen. Yamashita

There are 16 daycare schools in Los Baños, managed by DSWD and local government.

• University of the Philippines Los Baños
• University of the Philippines Open University
• Laguna State Polytechnic University (Los Baños Campus)
• Christian School International
• Maquiling School Incorporated
• Trace College
• Colegio De Los Baños
• Saint Anthony School-LB
• Los Baños National High School
• Los Baños National High School – Poblacion
• Tuntungin-Putho Integrated National High School
• Liceo de Los Baños
• University of the Philippines Rural High School
• Los Baños Central Elementary School
• Lopez Elementary School
• Bernaldo N. Calara Elementary School
• Liceo de Los Baños
• South Hill School Inc.
• San Antonio Elementary School
• The Learning Place International
• Morning Star Montessori School Inc.
• Maranatha Elementary School
• Hasik Bagong Buhay Christian School
• Joy in Learning School
• Los Baños Faith Christian School
• Lalakay Elementary School
• Malinta Elementary School
• Mayondon Elementary School
• Tuntungin Elementary School
• Bayog Elementary School
• Tadlac Elementary School
• Bagong Silang Elementary School

• Paciano Rizal – military general and revolutionary; older brother of José Rizal
• Rizalina Ilagan – anti-martial law activist that was abducted by state security agents and disappeared with nine other activists in what is believed to be the single biggest case of involuntary disappearance during Ferdinand Marcos' martial law in the Philippines that later came to be known as the Southern Tagalog 10.
• Tony Mabesa – National Artist of the Philippines for Theater.
• Ricardo Lantican – National Scientist of the Philippines for Plant Breeding ^[39]
• Aloysius Baes – environmental chemist, environmental and pro-democracy activist, educator, and musician.
• Rogel Mari Sese – Filipino astrophysicist who is known for being a proponent of space science in the Philippines.
• Jonas Baes – composer
• Bonifacio Ilagan – writer, filmmaker, journalist, and activist.
• Caesar Perez – 12th Vice Governor of Laguna and former Los Baños Mayor
• Cielito Habito – economist, professor, and former NEDA Director-General
• Emerlinda R. Roman – educator, university administrator, and 19th President of the University of the Philippines
• Benjamin Madrigal Jr. – 51st Chief of Staff of the Armed Forces of the Philippines
• Bryan Gahol – former Filipino professional basketball player in the Philippine Basketball Association.

• Davis, California, United States^[40]

Wikimedia Commons has media related to Los Baños, Laguna.

Wikivoyage has a travel guide for Los Baños (Laguna).

• Municipality of Los Baños official^{[permanent dead link‍]}
• Los Baños History
• Philippine Standard Geographic Code
• Philippine Census Information
• Local Governance Performance Management System
• Corazon T. Aragon; Miguelito M. De Lim; Gerardo L. Tioseco (1985). "Economics of Tilapia Cage Culture in Laguna Province, Philippines". In Ian R. Smith; Enriqueta B. Torres; Elvira O. Tan (eds.). Philippine Tilapia Economics (PDF). Philippine Council for Agriculture and Resources Research and Development. pp. 66–82. ISBN 971-1022-18-4. ISSN 0115-4435.