Pernambuco (pɛʁnɐ̃ˈbuku) is a state of Brazil, located in the Northeast region of the country. With an estimated population of 9.6 million people as of 2020, making it seventh-most populous state of Brazil and with around 98,148 km2, being the 19th-largest in area among federative units of the country, it is the sixth-most densely populated with around 89 people per km2. Its capital and largest city, Recife, is one of the most important economic and urban hubs in the country. Based on 2019 estimates, the Recife Metropolitan Region is seventh-most populous in the country, and the second-largest in northeastern Brazil. In 2015, the state had 4.6% of the national population and produced 2.8% of the national gross domestic product (GDP).
The contemporary state inherits its name from the Captaincy of Pernambuco, established in 1534. The region was originally inhabited by Tupi–Guarani-speaking peoples. European colonization began in the 16th century, under mostly Portuguese rule interrupted by a brief period of Dutch rule, followed by Brazilian independence in 1822. Large numbers of slaves were brought from Africa during the colonial era to cultivate sugarcane, and a significant portion of the state's population has some amount of African ancestry.
The state has rich cultural traditions thanks to its varied history and peoples. Brazilian Carnivals in Recife and the historic colonial capital of Olinda are renowned: the Galo da Madrugada parade in Recife has held world records for its size.
Historically a center of sugarcane cultivation due to the favorable climate, the state has a modern economy dominated by the services sector today, though large amounts of sugarcane are still grown. The coming of democracy in 1985 has brought the state progress and challenges in turn: while economic and health indicators have improved, inequality remains high.
The origins of the name Pernambuco are debated, though most hypotheses derive the name from the now-extinct Tupi language.