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