Sithney is a village in Cornwall, England.
It is situated within the TR13 postcode district, which is within the Helston post town.
The full list of postcode districts within the Helston post town is as follows:
The Helston post town is within the Truro postcode area.
Administrative Ward: Breage
Administrative District: Cornwall
Country: England
UK Parliament: St Ives
NHS Local Health Authority: South West
NHS Region: Southern