List of Sites of Special Scientific Interest by Area of Search

The following is a list of Sites of Special Scientific Interest (SSSI) by Area of Search, in the United Kingdom. SSSIs are areas of conservation, consisting of protected areas, recognised for their biological or geological significance. In Northern Ireland an SSSI is called an Area of Special Scientific Interest (ASSI).

The English counties were revised under the 1974 reorganisation of local government. Until the 2010s, Natural England, which maintains the database of English SSSIs, kept the listing of counties as it was in 1974, but by 2015 they had updated their lists to reflect later changes. For example, Avon was abolished in 1996 and is now divided by Natural England between Somerset, Gloucestershire and the "County of Bristol"; Hereford and Worcester was abolished in 1998 and divided into the two historic counties. The list of English counties below has not been updated to reflect these changes and is still based on the 1974 counties.

Natural England lists of SSSIs for each Area of Search in England:

...
Wikipedia