Setchey SSSI is a 33.4-hectare (83-acre) geological Site of Special Scientific Interest south of King's Lynn in Norfolk, England.

[1][2] It is a Geological Conservation Review site.

[3] This site throws light on sea level changes in the Holocene, the period since the end of the last ice age, 11,700 years ago.

It is part of a network of Fenland sites which allows correlation across the area.

[4] The site is private land with no public access.