Carn Ingli (Welsh: [karn ˈɪŋli]) is a Site of Special Scientific Interest (SSSI) in the Preseli Hills, Pembrokeshire, Wales.

It was designated a SSSI in January 1954 in an attempt to protect its fragile biological elements.

[1] The site has an area of 428.4 hectares (1,059 acres) and is managed by Natural Resources Wales.

It is the oceanic heathland vegetation which makes this area special.

Rock outcrops and associated blockfields add to the diversity as does the small areas of spring-fed flushes.