The 2006 Brisbane Broncos season was the nineteenth in the club's history. Coached by Wayne Bennett and captained by Darren Lockyer, they won the NRL's 2006 Telstra Premiership, finishing the regular season in 3rd place before going on to defeat the first-placed Melbourne Storm in the 2006 NRL Grand Final (their 6th).
The Broncos did not start the 2006 season well, suffering a 36–4 defeat by the previous year's runners-up, the North Queensland Cowboys in the first round. This was the 8th consecutive loss for the club and equalled the record for longest losing streak set in 2003. Round 2 saw the Broncos get their first win for the season and their first win since Round 21, 2005, with a 16–12 victory over the Cronulla-Sutherland Sharks (this was the third game in a row in which the Brisbane Broncos beat the Cronulla Sharks 16-12 at Toyota Park). The Broncos then went on to have a strong first half of the season, winning 11 of their first 17 games. Round 8 saw Brisbane produce their biggest comeback in the club's history when they came from 18–0 down at halftime to win 30–28 over the Canberra Raiders. But the year's biggest upset came when the team, missing key players through State of Origin, lost to the last-placed and previously winless South Sydney Rabbitohs 34-14 in Round 14.
After the 2006 State of Origin series finished, Brisbane once again suffered their "post-Origin Slump", losing five consecutive games from Round 18 to Round 23 inclusice. However, strong performances against the competition leaders Melbourne Storm (losing 18–12) and a resounding victory against the Canterbury Bulldogs 30-0 the following week saw a return to form. The Broncos then defeated the injury-struck Parramatta Eels 23-0 in Round 25 and then the New Zealand Warriors 36-12 in Round 26. It was the first time since 1999 that the Broncos conceded no points in consecutive rounds.