The 2019 World Series was the championship series of Major League Baseball's (MLB) 2019 season. The 115th edition of the World Series, it was a best-of-seven playoff between the American League (AL) champion Houston Astros and the National League (NL) champion Washington Nationals. The series was played from October 22 to October 30. Washington upset the favored Astros, four games to three, to secure its first title in franchise history and first in the capital city since the 1924 series. Washington pitcher Stephen Strasburg was named the World Series Most Valuable Player (MVP) after earning two wins in the series.

The Astros had home-field advantage because they had the better regular-season record. It was the third World Series in which home-field advantage was decided by the regular-season records of the American and National league champions, a practice that started in the 2017 Major League Baseball season. It was the first World Series in which the Houston Astros had home-field advantage. The series was played in a 2–3–2 format, with the Astros hosting Games 1, 2, 6, and 7; and the Nationals hosting Games 3, 4, and 5.

For the first time in any of the major North American sports leagues, the visiting team won all the games of a seven-game championship series,[6] surpassing the previous high of five.[7] The road team outscored the home team 49–14 in the seven games played. Washington won despite scoring only three runs at home. It was the sixth straight World Series in which the visiting team clinched the championship and the fourth consecutive seventh game of a Series won by the visiting team.