This is a list of the number one hits in Spain's Los 40 Principales chart, from its inception in 1966. * List of Los 40 Principales (Spain) number-one hits from the 1960s * List of Los 40 Principales (Spain) number-one hits from the 1970s * List of Los 40 Principales (Spain) number-one hits from the 1980s * List of Los 40 Principales (Spain) number-one hits from the 1990s * List of Los 40 Principales (Spain) number-one hits from the 2000s * List of Los 40 Principales (Spain) number-one hits from the 2010s