The KT postcode area, also known as the Kingston upon Thames postcode area,[2] is a group of 24 postcode districts in England, within 19 post towns.

These cover boroughs in south-west Greater London and several boroughs in north-east Surrey.

Mail for this area is sorted at the Jubilee Mail Centre in Hounslow.

In Greater London the area covers most of the Royal Borough of Kingston upon Thames and small parts of the boroughs of Merton, Richmond upon Thames and Sutton, while in Surrey it covers virtually all of the borough of Elmbridge, most of the borough of Epsom and Ewell, the northwestern part of the borough of Reigate and Banstead, the northern part of the Mole Valley district, the northeastern parts of the boroughs of Guildford and Woking and the southern part of the borough of Runnymede, as well as a very small part of the borough of Spelthorne.

The approximate coverage of the postcode districts: