John Barnard (born c. 1661–2; floruit 1685–93) was a supporter of James II of England.
According to Wood, in December 1685, after James II's accession, Barnard "took all occasions to talk at Bal.
On 3 January 1686–7 ‘came a mandamus from the king that he should succeed Mr. —— Halton, of Queen's College [Oxford], in the [White's] moral philosophy lecture.’ On 28 March 1687 he was elected and admitted moral philosophy reader.
In October 1688 he left the university, and soon afterwards sent in his resignation of his fellowship at Brasenose upon a forethought ‘that the Prince of Orange would turn the scales, as he did.’ He likewise resigned the moral philosophy lecture 5 January 1688–9.
He was ‘taken notice of’ by his majesty, who ‘talk'd familiarly with him.’ In September 1690 he returned from Ireland and came to Chester, ‘poor and bare.’ He was reconciled to the church of England, ‘as 'tis said,’ and was ‘maintain'd with dole for some time by the Bishop of Chester (Stratford).’ Wood states that he ‘wrote some little things that were printed.’ His only known literary performance was that he ‘continued, corrected, and enlarged, with great additions throughout,’ the ‘great Geographical Dictionary of Edmund Bohun, Esq.’ (1693, folio), and placed before it ‘A Reflection upon the Grand Dictionary Historique, or the Great Historical Dictionary of Lewis Morery, D.D., printed at Utrecht 1692.’ The date of his death is unrecorded.