How many studio albums did Led Zeppelin release?

Led Zeppelin were an English rock band formed in London in 1968. The group consisted of vocalist Robert Plant, guitarist Jimmy Page, bassist/keyboardist John Paul Jones, and drummer John Bonham. With their heavy, guitar-driven sound, they are regularly cited as one of the progenitors of heavy metal, although their style drew from a variety of influences, including blues and folk music.

Many critics consider Led Zeppelin one of the most successful, innovative, and influential rock groups in history. They are one of the best-selling music artists in the history of audio recording; various sources estimate the group's record sales at 200 to 300 million units worldwide. With Recording Industry Association of America (RIAA)-certified sales of 111.5 million units, they are the third-best-selling band and fifth-best-selling act in the US.

Each of their nine studio albums placed in the top 10 of the Billboard album chart and six reached the number-one spot. They achieved eight consecutive UK number-one albums. 'Rolling Stone' magazine described them as "the heaviest band of all time", "the biggest band of the Seventies", and "unquestionably one of the most enduring bands in rock history". They were inducted into the Rock and Roll Hall of Fame in 1995; the museum's biography of the band states that they were "as influential" during the 1970s as the Beatles were during the 1960s.