List of Sites of Special Scientific Interest in Lincolnshire

This is a list of Sites of Special Scientific Interest (SSSIs) in Lincolnshire. Note that Natural England, the designating body for SSSIs in England, uses the 1974–1996 county system, and this list follows the same approach. Some sites you may expect to find here could therefore be in the Humberside list.

This list features 76 SSSIs notable for their biology, fourteen notable for their geology and two notable for both. Five of the SSSIs include national nature reserves, four are Ramsar Wetland sites, and two are EU Special Protection Areas.

For other counties, see List of SSSIs by Area of Search.