1985–86 Cuban National Series

The silver jubilee 25th season of the Cuban National Series was the first to feature a scheduled postseason, as the first-place and second-place teams from each of the new Eastern and Western divisions qualified for a round-robin tournament to determine the league champion. The 18 teams in the league remained unchanged from recent seasons, but each team's regular-season schedule was reduced from 75 games to 48 games.

Advancing to the playoffs were Industriales, Vegueros, Santiago de Cuba and Villa Clara. Industriales went undefeated as they swept their competitors, clinching their sixth league title via a walk-off home run by Agustin Marquetti in extra innings against Vegueros on January 19, 1986, in front of their home fans.

Eastern zone
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