Orion, officially the Municipality of Orion,, is a municipality in the province of Bataan, Philippines. According to the 2020 census, it has a popula…Orion, officially the Municipality of Orion,, is a municipality in the province of Bataan, Philippines. According to the 2020 census, it has a population of 60,771 people. The town of Orion has various etymologies. One theory suggests that the town was initially called "Udyong," derived from the words "lu-ad" and "uryong," meaning muddy or swampy.