resort town, southwestern Luzon, Philippines. Near the southern shore of Laguna de Bay, it was named Los Baños (“The Baths”) for the thermal springs that flow from the base of Mount Makiling. The waters are piped into the town's numerous hotels.

Los Baños was the site of a U.S. air base and later of a Japanese concentration camp that was captured by U.S. forces on February 23, 1945. It is the site of the College of Agriculture of the University of the Philippines. In the 1960s the International Rice Research Institute, headquartered there, developed IR8, a high-yielding strain that has been called a miracle rice. Pop. (1980) mun., 49,555; (2000) mun., 82,027.