Gurnard's Head (Cornish: Ynyal, meaning desolate one) (grid reference SW432386) is a prominent headland on the north coast of the Penwith peninsula in Cornwall, England, UK. The name is supposed to reflect the fact that the rocky peninsula resembles the head of the gurnard fish.
It is north of the hamlet of Treen in the parish of Zennor, one mile to the west of Zennor Head. Almost entirely owned by the National Trust, the headland is within the Aire Point to Carrick Du SSSI, and the 630 miles (1,010 km) South West Coast Path crosses the southern part of the headland. The area is designated as part of the Penwith Heritage Coast and also designated as part of the Cornwall Area of Outstanding Natural Beauty. A pub and hotel on the B3306 coast road shares a name with the settlement.
The headland is the site of an Iron Age promontory fort known as Trereen Dinas. On the cliff-edge, above Treen Cove are the remains of Chapel Jane, which could have been a guild chapel of local fisherman. The earliest pottery dates from 1100 to 1150 AD, but the original simple structure of the chapel is comparable with the tiny chapels of St Helen's and Teän, on the Isles of Scilly. An association with the adjoining stream which according to local, 19th-century, tradition was regarded as a holy well, could indicate an earlier, possibly 8th-century founding.