Back in Black is the sixth studio album by Australian rock band AC/DC, released by Albert Productions and Atlantic Records on 25 July 1980. It was the band's first album to feature Brian Johnson as lead singer, following the death of Bon Scott, their previous vocalist.

After the commercial breakthrough of their 1979 album Highway to Hell, AC/DC was planning to record a follow-up, but in February 1980, Scott died from alcohol poisoning after a drinking binge. Instead of disbanding, the remaining members of the group decided to continue on and recruited Johnson, who had previously been vocalist for Geordie.

The album was composed by Johnson and brothers Angus and Malcolm Young, and recorded over seven weeks in the Bahamas from April to May 1980 with producer Robert John "Mutt" Lange, who had also produced Highway to Hell. Following its completion, the group mixed Back in Black at Electric Lady Studios in New York City. The album's all-black cover was designed as a "sign of mourning" for Scott.

Back in Black was an unprecedented commercial and critical success. It has sold an estimated 50 million copies worldwide, making it one of the best-selling albums in music history. AC/DC supported the album with a yearlong world tour that cemented them among the most popular music acts of the early 1980s. The album received positive critical reception at the time of its initial release, and has since been included on numerous lists of "greatest" albums. On 9 December 2019, the album was certified 25× Platinum by the Recording Industry Association of America (RIAA), making it the fourth best-selling album in the United States, and the best-selling album that never reached the top spot on the American charts.