The 1984 San Diego Padres season was the 16th season in franchise history. San Diego won the National League (NL) championship and advanced to the World Series, which they lost to the Detroit Tigers four games to one. The Padres were led by manager Dick Williams and third-year player Tony Gwynn, who won the NL batting title and finished third in voting for the NL Most Valuable Player Award.

The San Diego Padres are an American professional baseball team based in San Diego. The Padres compete in Major League Baseball (MLB) as a member club of the National League (NL) West Division. The team was founded as an expansion franchise in 1969. The Padres play their home games at Petco Park, which has served as the home ballpark of the team since 2004. The team's name, Spanish for "fathers", refers to the Spanish Franciscan friars who founded San Diego in 1769.