The Reading and Leeds Festivals are a pair of annual rock music festivals that take place in Reading and Leeds in England. The events take place simultaneously on the Friday, Saturday and Sunday of the August bank holiday weekend, sharing the same bill. The Reading Festival is held at Little John's Farm on Richfield Avenue in central Reading, near the Caversham Bridge. The Leeds event is held in Bramham Park, near Wetherby, the grounds of an historic house. Campsites are available at both sites and weekend tickets include camping. Day tickets are also sold.

The Reading Festival, the original and senior of the two, is the world's oldest popular music festival still in existence. It has had various musical phases over the years, as detailed below. In the twin-site era, rock, alternative, indie, punk and metal have tended to dominate.

The festivals are run by Festival Republic, which was divested from Mean Fiddler Music Group. For promotional purposes during 1998–2007 they were known as the Carling Weekend: Reading and the Carling Weekend: Leeds. These titles were seldom used when not required, although NME were contractually obliged to do so as part of its involvement. In November 2007, the organisers welcomed "Reading Festival reclaiming its prestigious name" when the sponsored title was abolished after 9 years. In 2011, the capacity of the Reading site was 87,000 and the Leeds site was 75,000. This was an increase of several thousand on previous years.