:Category:Sites of Special Scientific Interest in Northumberland

This category is for Sites of Special Scientific Interest (SSSIs) in Northumberland. Note that this category scheme follows that of English Nature, the designating body for SSSIs, which uses the 1974-1996 county system, so some sites you may expect to find here could be in the Tyne and Wear category.

{{Commons cat|Sites of Special Scientific Interest in Northumberland}}