2005 Formula Renault 2.0 Italia was the sixth season of the Italian Formula Renault Championship and the first under the name "Formula Renault 2.0 Italy." Most races were in Italy with one race at the Circuit de Spa-Francorchamps (Belgium). Kamui Kobayashi, who went on to drive in Formula One, won the competition. Jenzer Motorsport won the team competition.
Atte Mustonen won the Winter Series, an off-season championship.