John Josias Conybeare (1779–1824), the elder brother of William Daniel Conybeare, was a scholar of Anglo-Saxon.
He was an accomplished scholar, and studied at Christ Church, Oxford. He became vicar of Batheaston, and was Rawlinsonian Professor of Anglo-Saxon (1808–1812), and afterwards Professor of Poetry (1812–1821), at the University of Oxford.
Like his brother, he was a student of geology and communicated papers to the Annals of Philosophy and the Transactions of the Geological Society of London (Obituary in Ann. Phil. vol. viii., Sept. 1824, p. 162.)