On the day after Trinity Sunday, 1270, the Bishop admitted to the rectory Richard de Cetrefort, sub-deacon; patron, Sir Henry de Campo Armilfii (Champernowne).

In the taxation of Pope Nicholas IV the church of Jacobstow was taxed at £6.

About 1297, William, then chaplain of Jacobstow was one of the priests incarcerated in the Royal prison at Launceston Castle, on account of their refusal to surrender half their income to the Royal expenditure.

The chancel was rebuilt and the nave roof replaced at a cost of £700 in 1886 by architect Otho Bathurst Peter of Launceston.

The aisle roofs were reslated and releaded, the stonework was cleaned down and repointed.