Adeyfield was the first planned neighbourhood to be built in the postwar new town expansion of Hemel Hempstead, in the English county of Hertfordshire.

The neighbourhood spans from the Hemel Hempstead Industrial Estate in the east, to Queensway in the north, to the A414 (St Albans Road) in the south, to the Town Centre in the west.

It borders the neighbourhoods of Highfield, Bennetts End, Leverstock Green and the town centre (known locally as Paradise).

It was planned by the chief architect for the new town, Mr H Kellet Ablett who received the 'Urban Medal' for his work from the Eastern Housing Region.

[2] In order to provide some quick, easy and cheap accommodations after the Second World War, the easternmost part of Adeyfield was the chosen site for a set of temporary tin houses known as pre-fabs.