Sport Club Internacional (Portuguese pronunciation: [ˌĩtɛɾnɐsjɔˈnaw]) is a Brazilian football team and multi-sport club from Porto Alegre, Rio Grande do Sul, founded on April 4, 1909. They play in red shirts, white shorts and socks, the first of which gives the team its nickname of Colorado (The Red). They enjoy a traditional rivalry with the city's other big club, Grêmio - with derbies known as a "Gre-Nal". The team's home stadium is known as the "Giant of Riverside", or Beira-Rio, on the Giant of the Guaíba River, and it holds 60,000.

The club is one of only three teams that competed in all Brazilian National League's first division championships since its inception in 1971. Internacional is ranked first in Americasand sixth in the World in number of paying members, with more than 104,000 members.Internacional were South American champions in 2010, having won their second Copa Libertadores title. 2006 was the most successful year in Inter's history as they won theCopa Libertadores and the FIFA Club World Cup, defeating European champions FC Barcelona in the latter and South American reigning champions São Paulo FC in the former. Other international titles include the 2007 Recopa Sudamericana, the 2008 Copa Sudamericana and the 2011 Recopa Sudamericana.

Internacional is also one of only eight teams to have won CONMEBOL's treble (the others being Olimpia, São Paulo, Independiente, Vélez Sársfield, Cruzeiro, Boca Juniors and LDU Quito).