Millwall Football Club is a professional football club in Bermondsey, South East London, England. They compete in the EFL Championship, the second level of English football. Founded as Millwall Rovers in 1885, the club has retained its name despite having last played in the Millwall area of the Isle of Dogs in 1910. From then until 1993, the club played at what is now called The Old Den in New Cross, before moving to its current home stadium nearby, called The Den. The traditional club crest is a rampant lion, referred to in the team's nickname The Lions. Millwall's traditional kit consists of dark blue shirts, white shorts, and blue socks.

Bermondsey is a district in southeast London, part of the London Borough of Southwark, England, 2.5 miles (4.0 km) southeast of Charing Cross. To the west of Bermondsey lies Southwark, to the east Rotherhithe and Deptford, to the south Walworth and Peckham, and to the north is Wapping across the River Thames. It lies within the historic county boundaries of Surrey. During the Industrial Revolution Bermondsey became a centre for manufacturing, particularly in relation to tanning. More recently it has experienced regeneration including warehouse conversions to flats and the provision of new transport links.