Bacnotan, officially the Municipality of Bacnotan, is a coastal municipality in the province of La Union, Philippines. According to the 2020 census, it has a population of 44,388 people. The name Bacnotan is derived from the hispanized Iloco word "bakunutan" or "basnótan", which translates to "to flog" or "to whip" in English. Historically, the area was a vast expanse of wilderness inhabited by a group of natives governed by a rudimentary form of leadership. At one point, the town fell under the rule of a despotic chieftain who wielded absolute authority over his constituents. Under his oppressive regime, disobedience to his decrees was met with severe punishments, including public flogging.