The 2015 American League Championship Series (ALCS) was a best-of-seven playoff contested between the Toronto Blue Jays and Kansas City Royals for the American League (AL) pennant and the right to play in the 2015 World Series. The series is the 46th in league history. The series was broadcast by Fox and Fox Sports 1 in the United States, with Fox airing Game 1 and Fox Sports 1 airing Games 2–6. Sportsnet, a property of Blue Jays owner Rogers Communications, simulcast Fox and Fox Sports 1's coverage in Canada. Game 1 took place on October 16, and the series ended with the Royals winning Game 6 on October 23.

This was the second ALCS matchup between Kansas City and Toronto; the Royals previously rallied from a 3–1 deficit to defeat the Blue Jays in seven games in the 1985 ALCS.

The Kansas City Royals finished the season with a 95–67 record, winning the American League Central division title for the first time since that division was created in 1994. Their season win total was the most since winning 97 games in 1980. The Royals defeated the Houston Astros in five games in the American League Division Series (ALDS), advancing to their second straight ALCS and eighth overall.

The Toronto Blue Jays made it to the postseason for the first time since winning the 1993 World Series, finishing the season 93–69 to clinch the American League East title. Playing in their first ALDS in team history, the Blue Jays overcame a 2–0 deficit to defeat the Texas Rangers in five games and move on to the ALCS. It was their first ALCS appearance since 1993, and sixth overall.

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