Los Baños, officially the Municipality of Los Baños, colloquialy 'elbi' or simply LB, is a 1st class municipality in the province of Laguna, Philippines. According to the 2020 census, it has a population of 115,353 people. It has a total land area of 56.5 square kilometers 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.