The Borough of Dartford is a local government district with borough status in the north-west of the county of Kent, England. It is named after its main town of Dartford, where the council is based. Other notable settlements include Greenhithe, Stone and Swanscombe, along with an emerging new town at Ebbsfleet, and a number of smaller villages. The borough lies just outside the administrative boundary of Greater London, but a sizeable part of it lies within the M25 motorway which encircles London. Many of the borough's urban areas form part of the Greater London Built-up Area. The borough had a population of 116,800 at the 2021 census.

Kent is a county in the South East England region, the closest county to continental Europe. It borders Essex across the entire estuary of the River Thames to the north; the French department of Pas-de-Calais across the Strait of Dover to the south-east; East Sussex to the south-west; Surrey to the west and Greater London to the north-west. The county town is Maidstone.