Liliw is a fourth class municipality in the province of Laguna, Philippines. It is one of the highland towns forming the southern extremity of the province. According to the 2010 census, it has a population of 33,851.
Founded in 1571 by Gat Tayaw, the small town of Liliw is nestled at the foot of Mount Banahaw, 17 kilometres (11 mi) away from Santa Cruz, Laguna's capital.
According to a story, Liliw got its name from a bird. It was said that Gat Tayaw and his followers decided to erect a bamboo pole and to name the town after the bird that would first alight at the top of the pole within four days. A crow, however, was the first bird to alight on the pole. A crow was considered bad and so Gat Tayaw and his men moved south and erected another bamboo pole. A beautiful bird alighted on the pole and sang, "Liw, Liw, Liw". Thus the town became Liliw.
Throughout the Spanish regime, the name Liliw was used. When the Americans came, it became Lilio since the Americans found it easier to pronounce it than Liliw. However, on June 11, 1965, the municipal council passed Resolution No. 38-S-65 which declared Liliw as the official name and spelling of the town. This was to avoid confusion in pronouncing and spelling the name of the town.