Polillo, officially the Municipality of Polillo (), is a 3rd class municipality in the province of Quezon, Philippines. According to the 2020 census, it has a population of 31,908 people. It is located on the southern part of the eponymous Polillo Island fronting the Philippine Sea and its jurisdiction also includes Balesin Island in Lamon Bay (). History Trade relations between the natives of the Polillo Islands and Chinese merchants existed long before the Spanish conquerors came to the archipelago. Trade was a conglomeration of Malay-Hindu-Chinese-Tagalog. Padre Morga wrote that Polillo originated from the Chinese word "Pulilu", which means beautiful island with plenty of food, it was home to native a barangay-state which was also known as Pulilu and recorded as such in Chinese chronicles, it was mentioned as politically connected to the nation of Sandao, itself a vassal state to the nation of Ma-i. When Juan de Salcedo, a Spanish conqueror came to Polillo in 1567, he saw a central government fully organized through the Balangay, with a datu who had a direct supervision and control over all the natives. The inhabitants lived in nipa huts. In 1571 the Spaniards took hold of the islands of Pu Li Lu. Through the leadership of Padre Domingo, a Spanish friar, a chapel was built, where the old Spanish church was later constructed. After one and a half years, the people, through forced labor built a concrete wall to protect the "pueblo" of Pu Li Lu from moro pirate invaders. Watchtowers called "castillos" were erected in the four corners of the pueblo. The church was constructed in 1577 . Boulders, gravel and sand were mixed with lime produced out of seashells and coral stones. Padre Domingo instigated the planting of sugar cane in San Isidro, San Antonio and San Francisco. Production of molasses was put into full swing. Spanish conquistadores were assigned to the "pueblo" of Pu Li Lu to promote church construction. The church tower was constructed with priority, so that in 1587, in the early summer of May, two huge bronze bells rang atop. Due to language problems, Padre Domingo changed Pu Li Lu to Polillo. In 1942, the occupied by the Japanese Imperial forces landed in Polillo. In 1945, the liberation by the Philippine Commonwealth troops of the 5th and 52nd Infantry Division of the Philippine Commonwealth Army landed in Polillo we fought the battles against the Japanese forces