2004–05 Swansea City A.F.C. season

The 2004–05 season was Swansea City Association Football Club's 27th season in the newly formed Football League Two, and their 76th in English football. Alan Curtis had left the club early before the season's start, with Kenny Jackett replacing him. Swansea City gained promotion by finishing in third place. In the cup competitions, they reached the third round of the FA Cup, having defeated Cheltenham Town and Stockport County, before losing 2–1 on aggregate against Reading. A 3–0 loss against Queens Park Rangers saw Swansea exit in the first round of the League Cup. They were eliminated in the second round of the Football League Trophy, but reached the final in the FAW Premier Cup, beating Wrexham 2–1.

Lee Trundle was the club's top goalscorer with 23 goals in all competitions.