The Brisbane Broncos last won a Grand Final in 2006, securing their sixth NRL title with a 15-8 victory over the Melbourne Storm.
Here is a brief summary regarding the Broncos' Grand Final history:
- Last Premiership Win: 2006 (6th NRL title)
- Last Grand Final Appearance: 2023 (narrow loss to Penrith Panthers)
Therefore, the last time the Broncos won the Grand Final was in 2006.
