There are three divisions in the American League, and one of them is the West. There were four clubs from 1994 to 2012 and as many as seven teams in the division before the 1994 restructuring. The division now features five teams for the 2013 season. There were clubs from Chicago to Los Angeles in this division before its present location on the West Coast and Texas.

AL West was the only division with four clubs from 1998 to 2012 (NL West expanded from three to five teams in 1998).  The Houston Astros moved from the NL Central to the AL West in 2013. All six MLB divisions now have five clubs apiece, and both leagues now have 15 teams total, as a result of the new rule change.

The Houston Astros are the reigning Champions of the AL West Division title having won 4 titles since 2017.

Here is a list of all the AL West Division Titles Won by the Houston Astros:

2017

It was the Houston Astros’ 56th season playing in Major League Baseball as of the 2017 season (MLB). The Astros won their first AL West division title with a 7–1 victory against the Mariners. It was the Astros’ first 100-win season since 1998.

2018

For the Major League Baseball (MLB) team based in Houston, the 2018 season was the 57th season in the organization’s history. They won the American League West for the second consecutive season and swept the Cleveland Indians in the Division Series to proceed to the American League Championship Series, where they were defeated by the Boston Red Sox.

2019

The Astros won their third consecutive AL West title on September 22. This was the first time in team history that the Astros had a winning record and defeated the Tampa Bay Rays by a score of three games to two in the Division Series.

2021

For the fourth time in the last five years, the Astros finished the regular season with a 95–67 record, securing their fourth AL West division title and their sixth postseason participation in seven years. Dusty Baker became the only manager in major league history to lead five separate teams to division championships, giving him a total of eight-division victories.