2003–04 Serie C1

The 2003–04 Serie C1 was the twenty-sixth edition of Serie C1, the third highest league in the Italian football league system.

Semifinal

Final

Arezzo and Cesena promoted to Serie B

Varese, Pavia e Prato relegated to Serie C2

Repechage : Pavia e Prato admitted at Serie C1 2004-2005

Semifinal

Final

Catanzaro and Crotone promoted to Serie B

L'Aquila, Paternò,Taranto and Viterbese relegated to Serie C2

Varese, L'Aquila, Paternò, Viterbese