2008–09 British Basketball League season

The 2008–09 BBL season was the 22nd campaign in the history of the British Basketball League (BBL), which commenced on 14 September 2008 with the Cup Winners' Cup. The regular season began a week later with 12 teams competing, though a line-up change saw the Birmingham Panthers withdraw and fold during close season and the inclusion of Worthing Thunder from the English Basketball League.

Newcastle Eagles continued their dominance of Britain's basketball scene, scooping up the League title, the Play-off crown and the BBL Trophy, beating rivals Guildford Heat 71-83 at the Guildford Spectrum. After a promising rookie season for Everton Tigers in 2007–08, the Merseyside team came of age in their sophomore year, finishing as runners-up in the League and the play-offs whilst entering the record books for their 103-49 win in the BBL Cup Final against Plymouth Raiders, the biggest winning margin (54 points) in BBL history and lowest ever score conceded in a Final.

This season also saw the return of the BBL All-Star game, which was played as a warm-up to the play-off Grand Final. Two select-teams – the British All-Stars and the Rest of the World All-Stars – were pitted together using a selection of players from across the League, with the Rest of the World team narrowly winning 117-124.