The album topped magazine's Billboard 200 album list for its lengthy chart run, reported Entertainment Weekly.
"Adele's blockbuster 21 tops the Billboard 200's all-time albums ranking, fueled not only by the set's 24 nonconsecutive weeks atop the list (the most weeks at No 1 for an album by a woman), but also its lengthy chart run in the upper reaches of the tally," read a post on Billboard.
The second in the list was the soundtrack to "Sound of Music," while Michael Jackson's "Thriller" came third.