East Walton and Adcock's Common is a 62.4-hectare (154-acre) biological and geological Site of Special Scientific Interest south-east of King's Lynn in Norfolk, England.

[1][2] It is a Geological Conservation Review site[3] and part of Norfolk Valley Fens Special Area of Conservation[4] These commons have periglacial depressions separated by chalk ridges.

The habitats include chalk grassland, springs, open water and scrub.

The grasses and herbs are diverse with up to thirty-two species per square metre, and the rich invertebrate fauna includes seven Red Data Book and seventy-nine nationally rare species.

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