Forster was born some time in 1726 in Crewkerne, Somerset, the son of a vicar, and died on 12 April 1790 at Colchester. His cousin, also Nathaniel Forster, was a noted scholar and editor of the works of Plato. Forster matriculated at Balliol College, Oxford in 1742, but then moved to Magdalen College from which he graduated BA in 1745 and MA in 1748. He was then elected a fellow of Balliol, from which he received a DD in 1778. His date of ordination is not known, but by 1764 he was rector of Tolleshunt Knights, Essex, and by 1777 was rector of Colchester.
From The Biographical Dictionary of British Economists in Oxford Reference.