Marilao, officially the Municipality of Marilao, is a municipality in the province of Bulacan, Philippines. According to the 2020 census, it has a population of 254,453 people. Marilao is derived from the Tagalog word "marilaw", which translates to yellowish, with its root word "rilaw" is linked to "dilaw," the Tagalog term for yellow. This is in reference to a yellow plant that grew abundantly in the area.