The 2004 New York Yankees season was the 102nd season for the team. The Yankees opened the season by playing two games against the Tampa Bay Devil Rays in Japan on March 30, 2004. The team finished with a record of 101–61, finishing 3 games ahead of the Boston Red Sox in the AL East. The 2004 season was the Yankees third straight season of 100+ wins, the first such instance in franchise history. New York was managed by Joe Torre. In the playoffs, the Yankees defeated the Minnesota Twins, 3 games to 1, in the ALDS, before losing to the wild card Boston Red Sox, 4 games to 3, in the ALCS. The 2004 Yankees are notable as the only team in MLB history to lose a 7-game playoff series after taking a 3 games to none lead. This was the fourth straight year in which the Yankees lost to the eventual World Series champions in the postseason. Only the Los Angeles Dodgers (2016–19) have duplicated the same feat.

The American League East is one of Major League Baseball's six divisions. MLB consists of an East, Central, and West division for each of its two 15-team leagues, the American League (AL) and National League (NL). This division was created before the start of the 1969 season along with the American League West division. Before that time, each league consisted of 10 teams without any divisions.