Knettishall is a village in Suffolk, England.
It is situated within the IP22 postcode district, which is within the Diss post town.
The full list of postcode districts within the Diss post town is as follows:
The Diss post town is within the Ipswich postcode area.
Administrative Ward: Barningham
Administrative District: St Edmundsbury
Administrative County: Suffolk
Country: England
UK Parliament: West Suffolk
NHS Local Health Authority: East of England
NHS Region: North, Midlands and the East