| Jeffreyston Pastures | |
| Aos: | Pembrokeshire |
| Interest: | Biological |
| Coordinates: | 51.7193°N -4.7685°W |
| Displaymap: | Wales |
| Notifydate: | 1996 |
Jeffreyston Pastures is a Site of Special Scientific Interest (or SSSI) in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1996 in an attempt to protect its fragile biological elements.[1] The site has an area of and is managed by Natural Resources Wales.
This site is designated due to its biological qualities. SSSIs in Wales have been notified for a total of 142 different animal species and 191 different plant species.