The 2015 American League Division Series were two best-of-five-game series to determine the participating teams in the 2015 American League Championship Series. The three divisional winners (seeded 1-3) and a fourth team—the winner of a one-game Wild Card playoff— played in two series. Fox Sports 1 carried the majority of games in the United States, while Sportsnet primarily simulcast Fox Sports 1's coverage in Canada.MLB Network had exclusive coverage of Game 3 of the Kansas City Royals–Houston Astros series in both the United States and Canada, and Game 2 of the Toronto Blue Jays–Texas Rangers series in the U.S. only (Sportsnet, co-owned with the Blue Jays by Rogers Communications, simulcast MLB Network's coverage for the latter). The ALDS began on October 8 and ran until October 14. The Toronto Blue Jays and Kansas City Royals had home field advantage in this round of the playoffs. With the New York Yankees being eliminated by the Astros in the AL Wild Card Game, this is the first time in ALDS history that all four ALDS teams were expansion teams.

These matchups were:

The higher seeded team in each series hosted Games 1, 2, and 5, and the lower seeded team hosted Games 3 and 4.

This was the first ALDS appearance for both the Astros and Blue Jays. Toronto's last postseason berth came in 1993, the final season of the two-round playoff format. Houston, on the other hand, made its first playoff appearance as an American League team; the franchise's preceding postseason berth came in 2005 while a member of the National League. The Blue Jays and the Rangers, and the Astros and the Royals, met for the first time in postseason play.

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