Marcos, officially the Municipality of Marcos, is a municipality in the province of Ilocos Norte, Philippines. According to the 2020 census, i…Marcos, officially the Municipality of Marcos, is a municipality in the province of Ilocos Norte, Philippines. According to the 2020 census, it has a population of 18,010. Formerly a part of Dingras, Ilocos Norte, Marcos was created on June 22, 1963, by Republic Act No. 3753, named in honor of Mariano Marcos, the father of former President Ferdinand Marcos and the grandfather of current president Bongbong Marcos.