The 2005 Magny-Cours Porsche Supercup round was a Porsche Supercup motor race held on 3 July 2005 at the Circuit de Nevers Magny-Cours in Magny-Cours, France.

It was the sixth race of the 2005 Porsche Supercup.

The race was used to support the 2005 French Grand Prix.