Dartford is a local government district and borough in Kent, England. It has a population of 80,000 and is part of the London commuter belt. The town of Dartford is the administrative capital and is so named from the the River Darent which flows through the town northwards to the River Thames, the northern border of the borough (in Saxon times the town was Darentford, in the Domesday Book Tarenteford) .

Dartford is the principal town in the borough of Dartford. It is situated in the northwest corner of Kent in South East England, 16 miles (25 km) east south-east of central London.

Dartford is a constituency represented in the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election. It has been a marginal Labour-Conservative seat since the 1920s.