John D'Alton was born at Bessville, county Mestmeath, Ireland. He studied law at the Middle Temple (1811) before being called to the Irish bar in 1813. He took his B.A. at Trinity College, Dublin in 1829, where he won a prize in 1831. He published translations from Gaelic poetry and wrote on historical topics.
Dermid; or, Erin in the days of Boru: a poem. 1814.
Essay on the history, religion, learning, arts, and government of Ireland. 1830.
On the necessity of publishing the ancient annals, etc. of Ireland, and the policy of inducing a literary taste in that country. 1831.
The history of tithes, church lands, and other ecclesiastical benefices. 1832.
The history of the county of Dublin. 1838.
The history of Drogheda: with its environs, and an introductory memoir of the Dublin and Drogheda railway. 1844.
The history of Ireland, from the earliest period to the year 1245. 1845.
Brief essay on the native annals, and other sources for illustrating the history and topography of Ireland. 1845.
Cead mile failte: Visit of Her Most Gracious Majesty, Queen Victoria, and His Royal Highness Prince Albert, to Ireland, August, 1849. 1849.
Illustrations, historical and genealogical: of King James's Irish army list (1689). 1855.
The history of Dundalk, and its environs. 1864.