The UAAP Season 50 basketball tournaments involved 23 teams from the eight member schools that played two rounds of elimination games in the University Athletic Association of the Philippines (UAAP) in the 1987–88 school year. Ateneo de Manila University was the host school for the second time since joining the league in 1978. The UP Fighting Maroons and the Adamson Lady Falcons were the defending men's and women's champions, while the Ateneo Blue Eaglets have been the juniors' champions since Season 46 (1983).