Platt, or St. Mary's Platt is a village in the local government district of Tonbridge and Malling in Kent, England. The village contains a church which was built in 1843 and which stands on a hill overlooking the village centre. The architects were Whichcord and Walker of Maidstone.The hamlet of Crouch (pronounced Crooch) lies within the parish. The River Bourne flows through the western part of the parish. Basted Paper Mill was within the parish boundary.