The Governor of Pendennis Castle was a military officer who commanded the fortifications at Pendennis Castle, part of the defences of the River Fal and Carrick Roads, on the south coast of Cornwall near Falmouth. Originally fortified under Henry VIII, defences in the area were intermittently maintained until after the Second World War. The office of governor was abolished in 1837, when Gen. Anderson received the colonelcy of the 78th Regiment of Foot.

The early Governorship was a quasi-hereditary office, whose holders were as follows: