Portuguese (português or língua portuguesa) is a Romance language that originated in what is now Galicia and northern Portugal. It is derived from the Latin spoken by the romanized Pre-Roman peoples of the Iberian Peninsula (namely the Gallaeci, the Lusitanians, the Celtici and the Conii) around 2000 years ago. It spread worldwide in the 15th and 16th centuries as Portugal established a colonial and commercial empire (1415–1999) which spanned from Brazil in the Americas to Goa and other parts of India and Macau in China. It was used as the exclusive lingua franca on the island of Sri Lanka for almost 350 years. During that time, many creole languages based on Portuguese also appeared around the world, especially in Africa, Asia, and the Caribbean.

Portuguese it is one of the world's major languages, ranked 6th according to number of native speakers (between 177 and 191 million). It is the language of about half of South America, even though Brazil is the only Portuguese-speaking nation in the Americas. It is also a major lingua franca in Portugal's former colonial possessions in Africa. It is an official language in nine countries (see map), also being co-official with Cantonese Chinese in the Chinese special administrative region of Macau, Tetum in East Timor and Spanish and French in Equatorial Guinea. There are sizeable communities of Portuguese speakers in various regions of North America, notably in the United States (New Jersey, New England, and south Florida) and in Ontario, Canada.

Spanish author Miguel de Cervantes once called Portuguese "the sweet language".

Countries where Portuguese is the oficial language: