Lessness Heath is a district in the London Borough of Bexley, in the area of Belvedere.

Lessness was recorded in the Domesday Book in 1086, as the largest settlement in the Hundred of Litlelee in Kent and contained 68 households at that time.

[3] At around 1762, Emanuel Bowen recorded the place as Leesing on one of his maps, then in 1805 an Ordnance Survey map recorded it as Lesness Heath.

[3] It has been suggested the name may be from an Old English word hlēosne, the plural of hlēosn meaning 'Burial mound' or 'shelter', later possibly adding the word næss meaning 'headland' to the end.

[4] In 1178, the Abbey of St Mary and St Thomas the Martyr at Lesnes, Lesnes Abbey, was founded near Lessness Heath and named after it.