Sevenoaks Town Knole House Sevenoaks Sevenoaks shown within Kent Population 29,506 [1] 20,409 (2011 Census)[2] Demonym Sennockian Old Sennockian (Exclusive to Sevenoaks School alumni)[3] OS grid reference TQ525555 Civil parish Sevenoaks District Sevenoaks Shire county Kent Region South East Country England Sovereign state United Kingdom Post town Sevenoaks Postcode district TN13, TN14, TN15 Dialling code 01732 Police Kent Fire Kent Ambulance South East Coast EU Parliament South East England UK Parliament Sevenoaks