Sport Club Internacional (Portuguese pronunciation: [ˌĩteɾnɐsjoˈnaw]) is a Brazilian multisport club based in Porto Alegre, Rio Grande do Sul.

It was founded on April 4, 1909 by the Poppe brothers, making clear the goal of being a democratic institution without prejudice. It has it's colors red and white and its fans are known as Colorado. Its historical rival is Grêmio, with whom it contests the Grenal, one of the greater classics of the world . It is one of the most successful clubs in Brazil and America in recent years, being the third largest international champion in the country, with 7 trophies.

Although they compete in a number of different sports, Internacional is mostly known for its association football team. Internacional plays in the Campeonato Gaúcho, the state of Rio Grande do Sul's premier state league, as well as in the Brasileirão Série A. The team's home stadium, known as Beira-Rio ("Riverside"), was one of the twelve 2014 FIFA World Cup venues and has a capacity of 51,300.

Internacional is ranked first in Brazil in number of partner supporters, with more than 200,000 . Internacional were South American champions in 2010, winning their second Copa Libertadores title. 2006 was the most successful year in Inter's history as they won the Copa Libertadores and the FIFA Club World Cup for the first time, defeating European champions Barcelona in the latter and Club World Cup reigning champions São Paulo in the former. Other major honours include the 1975, 1976 and 1979 Campeonato Brasileiro Série A, the latter being undefeated throughout the campaign, the 2007 and the 2011 Recopa Sudamericana, the 1992 Copa do Brasil and the 2008 Copa Sudamericana.