Theydon Garnon is a village in Essex, England.
It is situated within the CM16 postcode district, which is within the Epping post town.
CM16 is the only postcode district within the Epping post town.
The Epping post town is within the Chelmsford postcode area.
Administrative Ward: Passingford
Administrative District: Epping Forest
Administrative County: Essex
Country: England
UK Parliament: Brentwood and Ongar
NHS Local Health Authority: East of England
NHS Region: North, Midlands and the East