New Barn is a village in Kent, England. It is a compact residential area surrounded by open fields which lies four miles southwest of Gravesend. It is in the local government district of Dartford. The villages of New Barn and Longfield are within and give their names to the civil parish of Longfield and New Barn. New Barn is larger in population than Longfield, although has little in the way of services, being a recent development and purely residential in nature