1

1 is a compilation album released on November 13, 2000, by the English rock band the Beatles. From 1962 to 1970, the band had nearly every number-one single in the United Kingdom or the United States. It was their first compilation, released on a single CD on the 30th anniversary of their breakup. 1 was a commercial success, topping charts all over the world. Over 31 million copies have been sold.

Since Nielsen SoundScan began tracking US album sales in January 1991, 1 has been the fourth best-selling album in the United States, the best-selling album of the 2000s decade in the United States, and the best-selling album of the decade globally. In September 2011, 1 was remastered and reissued. In November 2015, it was remixed and reissued in several different deluxe editions, the most comprehensive of which is a three-disc set titled 1+, which includes video discs of Beatles promotional films.