Trelissick is a house and garden in the ownership of the National Trust at Feock, near Truro, Cornwall, England. It is located on the B3289 road, just west of King Harry Ferry, and overlooks the estuary known as Carrick Roads. It lies within the Cornwall Area of Outstanding Natural Beauty (AONB). Almost a third of Cornwall has AONB designation.

Feock is a coastal civil parish and village in Cornwall, England, United Kingdom. It is about 5 miles (8.0 km) south of Truro at the head of Carrick Roads on the River Fal. To the south, the parish is bordered by Restronguet Creek and to the east by Carrick Roads and the River Fal. To the north it is bordered by Kea parish and to the west by Perranarworthal parish.