The 2005 Football League Championship play-off Final was an association football match which was played on 30 May 2005 at the Millennium Stadium, Cardiff, between Preston North End and West Ham United. The match was to determine the third and final team to gain promotion from the Football League Championship, the second tier of English football, to the FA Premier League. The top two teams of the 2004–05 Football League Championship season gained automatic promotion to the Premier League, while the clubs placed from third to sixth place in the table took part in play-off semi-finals; Preston ended the season in fifth position while West Ham finished sixth. The winners of these semi-finals competed for the final place for the 2005–06 season in the Premier League. Ipswich Town and Derby County were the losing semi-finalists. Winning the final was estimated to be worth up to £31 million to the successful team.

West Ham United Football Club is an English professional football club that plays its home matches in Stratford, East London. The club competes in the Premier League, the top tier of English football. The club plays at the London Stadium, having moved from their former home, the Boleyn Ground, in 2016.