TEX clinched division title and home field through World Series.
CHC clinched division title and home field through NL playoffs.
BOS, CLE, WSH, LAD clinched division titles.
BOS holds tiebreaker over CLE if both teams finish tied for No. 2 seed in AL.
LAD holds tiebreaker over WSH if both teams finish tied for No. 2 seed in NL.
Due to the strike in 1981, the season was split into two halves and playoff seedings were determined using the winners from each half. The first half began on April 9 and ended June 11, while the second half started on August 10 and ended October 4. Overall standings are presented here for reference but were not used to determine playoff berths.