Lists of Sites of Special Scientific Interest in West Gwynedd (1974–1996) comprise:
- List of Sites of Special Scientific Interest in Anglesey
- List of Sites of Special Scientific Interest in Gwynedd
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/West_Gwynedd_AOS.png/220px-West_Gwynedd_AOS.png)
West Gwynedd AOS
Lists of Sites of Special Scientific Interest in West Gwynedd (1974–1996) comprise: