The 2009 Formula Renault 2.0 UK Championship was the 21st British Formula Renault Championship. The season began at Brands Hatch on 5 April and ended at the same venue on 4 October, after twenty rounds held in England. Dean Smith won the title, despite missing the opening rounds of the series. Harry Tincknell won the Graduate Cup for first-year drivers.

British Formula Renault Championship referred to one of two Formula Renault championships that were held in the United Kingdom. The main series was Renault Sport UK's Formula Renault 2.0 UK championship which was held from 1989 to 2011 and was generally recognized as the British Formula Renault championship. However, in March 2012 it was announced that the Formula Renault UK series would not take place in 2012, with the series being ended definitively in September 2012. A secondary championship organised by the British Automobile Racing Club and known as the Protyre Formula Renault Championship was held continuously between 1995 and 2014. The championship was the only Formula Renault 2.0 championship operating in the United Kingdom after the demise of the main series, but was ended after the 2014 season.