Portugal Telecom (Euronext: PTC) is the biggest telecommunications Portugal and Brazil. It also has a significant presence in Morocco, Guinea-Bissau, Cape Verde, Mozambique, Timor-Leste, Angola, Kenya, the People's Republic of China, and São Tomé and Príncipe.

Portugal Telecom was the only telephone operator in Portugal, being a monopoly, until 1994, when the government gradually retired its control over the corporation and in 2000 Portugal Telecom became a publicly owned company. Since then, it has held a dominant position in the liberalized Portuguese market.