John Fullarton (c.1645 – 1727), of Greenhall, Argyll, was a Scottish clergyman and nonjurant Episcopal Bishop of Edinburgh between 1720 and 1727.
His grandfather is thought to have been Duncan, or Donald McCloy, minister at Kilmodan between at least 1609 and 1629, who was still alive as late as 1659, when he received a grant from the Synod of Argyll because of his poverty.
Robert Wodrow recorded in 1703 that Fullarton was present with other Episcopal clergy at a service in Glasgow to commemorate the execution of Charles I, and he also preached there.
(According to Thomas Stephen: "The hope of the restoration of the old dynasty was strong in the minds of the bishops...”) The Scottish Magazine and Churchman's Review summed up Fullarton's episcopate in this way: “...he greatly exerted himself to accommodate the differences which existed among the clergy respecting usages, and endeavoured also to restore a proper distribution of Episcopal superintendence, for which, however, the state of the Church was not then ripe".
Fullarton married, first, Anna Haldane (who died 28 July 1679), secondly, Barbara Hamilton and, thirdly, Isobel Sinclair.