It is a 4th class municipality in the province of Pampanga, Philippines.
According to the latest census, it has a population of 25,238 people in 3,029 households. Don Guillermo Manabat is a rich landlord believed to be the founder of Bacolor. During the British Occupation of the Philippines, it became capital of the exiled government of Governor General Simón de Anda y Salazar from 1762 to 1764. It was the former capital town of Pampanga until the provincial seat of government was transferred to neighboring City of San Fernando in 1904. When it was capital of the Philippines, the provincial offices were temporarily moved to Factoria (now San Isidro, Nueva Ecija).
The town was completely buried under several feet of lahar from Mount Pinatubo, with the most devastating flow covering the town center in 1995.