The 2005 Football League Two play-off Final was an association football match played on 28 May 2005 at the Millennium Stadium, Cardiff, between Southend United and Lincoln City. The match determined the fourth and final team to gain promotion from Football League Two, English football's fourth tier, to Football League One. The top three teams of the 2004–05 Football League Two season gained automatic promotion to League One, while the teams placed from fourth to seventh in the table took part in play-off semi-finals; the winners of these semi-finals competed for the final place for the 2005–06 season in League One. Southend United finished in fourth place while Lincoln City ended the season in sixth position. They defeated Northampton Town and Macclesfield Town, respectively, in the semi-finals.

Southend United Football Club is a professional association football club based in Southend-on-Sea, Essex, England, which competes in the National League, the fifth level of English football. The team are known as "The Shrimpers", a reference to the area's maritime industry that is included as one of the quarters on the club badge.