George Fejer (Hungarian: Fejér György) (April 23, 1766 - July 2, 1851), Hungarian author, was born at Keszthely, in the county of Zala.

He studied philosophy at Pest, and theology at Pressburg; eventually, in 1808, he obtained a theological professorship at Pest University. Ten years later (1818) he became chief director of the educational circle of Raab, and in 1824 was appointed librarian to the university of Pest. Fejer's works, which are nearly all written either in Latin or Hungarian, exceed one hundred and eighty in number.

His most important work, Codex diplomaticus Hungariae ecclesiasticus no civilis, published from 1829 to 1844, in eleven so-called tomes, really exceeds forty volumes. It consists of old documents and charters from AD 104 to the end of 1439, and forms an extraordinary monument of patient industry. This work and many others relating to Hungarian national history have placed Fejer in the foremost rank of Hungarian historians.

His later works were A Hunok eredete (The Origin of the Huns), and A politikai forradalmak okai (The Causes of Political Revolutions), both published in 1850. The latter production, on account of its liberal tendencies, was suppressed by the Austrian government.

See Magyar Irók: Életrajz-gyüjtemény (Pest, 1856), and A magyar nemzeti irodalomtörténet vázlata (Pest, 1861).