Abbotts Hall Farm is a 282 hectare nature reserve in Great Wigborough in Essex. It is the head office of the Essex Wildlife Trust, which manages the site. It is also part of the Blackwater Estuary National Nature Reserve, Site of Special Scientific Interest, Ramsar site, Special Protection Area and Special Area of Conservation, It is an important archaeological site, and includes a Scheduled Monument, Great Wigborough henge.
This is a working farm which is managed to encourage wildlife. New seawalls have been built to create marshland, which has many fish which provide food for migrating birds. A new lake has also been constructed, and fields provide additional habitats for fauna such as skylarks.
There is access to some areas and footpaths across others.