The 1981 Cincinnati Reds season consisted of the Reds finishing with an overall record of 66–42, giving them the best win–loss record in all of Major League Baseball. However, due to a split-season format, caused by a mid-season players' strike, they failed to make the MLB playoffs this year because they did not finish first in either half of the season. The Reds finished the first half of the season in second place with a record of 35–21, just one-half game behind the eventual World Champion Los Angeles Dodgers, and one-and-a-half games behind the Houston Astros in the second half, in which the Reds were 31–21, good for second place, again. The Reds were managed by John McNamara and played their home games at Riverfront Stadium.