The 1986–87 Carlsberg National Basketball League season was the fifteenth and last season of the National Basketball League formed in 1972.
Portsmouth won the first division league title, Kingston Kings claimed the Play Off's & Crystal Palace lifted the National Cup for the seventh time in their history.
The second merger came four months later at the beginning of September 1986 when Crystal Palace and Brunel Uxbridge & Camden Ducks joined forces with fixtures being split between the Crystal Palace Sports Centre and Brunel University.
In between the two mergers the Nissan Worthing Bears and Tyneside Basketball Club both folded.
The EBBA admitted two new teams in the form of Calderdale Explorers and Derby Rams from the second division.