John Allen (1771–1839) was an English dissenting layman and religious writer.
Allen was born at Truro in 1771 and educated there by a Dr Cardue.
He afterwards kept an academy, the Madras House grammar school, for 30 years in Hackney, where he died on 17 June 1839.
[1] Allen's major work, first published in 1816, was Modern Judaism; or a Brief Account of the Opinions, Traditions, Rites, and Ceremonies of the Jews in Modern Times (i. e. since the Christian era).
It was reprinted in 1830.