East Winch Common is a 26.1-hectare (64-acre) biological Site of Special Scientific Interest south-east of King's Lynn in Norfolk, England.

[1][2] It is common land and is managed by the Norfolk Wildlife Trust.

[3] This site is mainly wet acid heath on peat, and it is dominated by heather and cross-leaved heath.

There are many wet hollows, which have diverse fen and mire flora, and areas of young woodland.

[4] The reserve is open to the public.