Luzon is the largest and most populous island in the Philippines and the 15th largest in the world. Located in the northern region of the archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as well as Quezon City, the country's most populous. With a population of 48 million as of 2010, it is the fourth most populous island in the world, containing about 53% of the Philippines' total population.

Luzón is a municipality in the comarca of Señorío de Molina-Alto Tajo, province of Guadalajara, Castile-La Mancha, in central Spain. According to the 2012 census of the INE, the municipality has a population of only 79 inhabitants, having undergone a severe population decline since the last half of the twentieth century.