The Houston Astros are a Major League Baseball team in the American League Western Division. They were previously in the National League Central Division until forced to switch leagues as part of an ownership change for which the buyers received a discount for consenting to the change.
- National League Pennants: 1 (2005)
- American League Pennants: 4 (2017, 2019, 2021, 2022)
- World Series Championships: 2 (2017, 2022) (the 2017 championship has been overshadowed by the revelation that the team had an intricate "sign stealing" methodology, resulting in the firing of their manager and general manager; MLB has had numerous requests to strip the team of its title but did not, as the Boston Red Sox were also guilty of said offenses yet were punished less severely)