The 2019âÂÂ20 Big Bash League season or BBL|09 was the ninth season of the Big Bash League, the professional men's Twenty20 domestic cricket competition in Australia. The tournament started on 17 December 2019 and concluded on 8 February 2020.
The length of the season was shortened from the previous season, although the number of matches was increased from 59 to 61. The post-season stage of the tournament was revamped into a play-off system, with the top two teams in the league getting a second chance to advance to the final even if they lost the first match in the play-offs.
Melbourne Renegades were the defending champions, but finished last in the group stage. In the final, Sydney Sixers beat Melbourne Stars by 19 runs.