1983 Major League Baseball postseason

The 1983 Major League Baseball postseason was the playoff tournament of Major League Baseball for the 1983 season. The winners of each division advance to the postseason and face each other in a League Championship Series to determine the pennant winners that face each other in the World Series.

In the National League, the Philadelphia Phillies returned to the postseason for the sixth time in eight years, and the Los Angeles Dodgers were making their fifth postseason appearance in the last seven years. In the American League, the Baltimore Orioles returned to the postseason for the first time since 1979, and the Chicago White Sox made their first postseason appearance of the Divisional Era, marking the first time since 1959 that a Chicago MLB team made the postseason.

The playoffs began on October 4, 1983, and concluded on October 16, 1983, with the Orioles defeating the Phillies in five games in the 1983 World Series. This was the first title since 1970 for the Orioles and third overall.