San Nicolas, officially the Municipality of San Nicolas, is a municipality in the province of Ilocos Norte, Philippines. According to the 2020 census, it has a population of 38,895 people. San Nicolas is the only town in Ilocos Norte that is named after a saint - St. Nicholas of Tolentino. Since 1733, it is believed that he has protected the people against floods, earthquakes, fires, typhoons, and other calamities.