The Renault R26 is a Formula 1 racing car used by the Renault F1 team in the 2006 Formula 1 season, driven by Fernando Alonso and Giancarlo Fisichella.

Over the course of the season it scored 8 wins out of 18 races, and was the most complete package in most of the year, followed closely by the rival Ferrari 248 F1.

The R26 helped Renault in claiming the Constructors' Championship with a 5-point advantage over rival Ferrari, and also taking Fernando Alonso to his second Drivers' Championship in succession, 13 points ahead of rival Michael Schumacher.