Delta is the fourth studio album by British band Mumford & Sons. It was released on 16 November 2018 through Gentlemen of the Road and Island Records. The album was recorded at The Church Studios in London with producer Paul Epworth. The album reached number one on the US Billboard 200 and number two on the U.K. Albums chart.

The album was supported by the lead single, Guiding Light, which premiered on 20 September 2018 on BBC Radio 1. It was also supported by a 60-date world tour that began in November 2018.

It debuted at Number One on the US Billboard 200  with 237,000 album-equivalent units including 214,000 pure album sales. It is Mumford & Son's third U.S. Number One album.