List of Sites of Special Scientific Interest in Oxfordshire

Oxfordshire in South East England has an area of 2,605 square kilometres and a population of 648,700. In England, the body responsible for designating Sites of Special Scientific Interest (SSSIs) is Natural England, which is responsible for protecting England's natural environment. Notification as an SSSI gives legal protection to the best sites for wildlife and geology. As of 2020, there are 111 SSSIs in Oxfordshire, 78 of which have been designated for biological interest, 27 for geological interest, and 6 for both biological and geological interest.

Interest

 * B = site of biological interest
 * G = site of geological interest

Public access

 * FP = access to footpaths through the site only
 * No = no public access to site
 * PP = public access to part of site
 * Yes = public access to all or most of the site

Other designations and wildlife trust management

 * BBOWT = Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust
 * GCR = Geological Conservation Review site
 * LNR = Local nature reserve
 * NCR = Nature Conservation Review site
 * NNR = National nature reserve
 * Ramsar = Ramsar site, an internationally important wetland site
 * SAC = Special Area of Conservation
 * SM = Scheduled monument
 * SPA = Special Protection Area