The 1975–76 Guinness National Basketball League season was the fourth season of the National Basketball League formed in 1972.The league was sponsored by Guinness and the number of teams participating remained at ten. One new team appeared in the form of the Leeds Larsen Lions club but Exeter St Lukes dropped out.The Crystal Palace team known as Cinzano Crystal Palace for sponsorship purposes (and devoid of the Sutton merger) completed the double of National League and Cup. There were no play off's for the League during this era and American Jim Guymon of Crystal Palace won the George Williams Trophy for the MVP award.