The Rev. Sidney Faithorn Green (1841–1916) was a British clergyman who, during the Ritualist controversies in the Church of England, was imprisoned for 20 months for liturgical practice contrary to the Public Worship Regulation Act 1874.
Sidney Faithorn Green was born in Kent in 1841. he studied at Tonbridge School and Cambridge University. Green was ordained a priest of the Church of England in Manchester in 1866, and served as a Curate in Swinton until his appointment as incumbent of St John the Evangelist, Miles Platting, Manchester. He was a follower of the Oxford Movement who celebrated the Eucharist in the style of Anglo-Catholicism, see Anglican Eucharistic theology.
In 1883, Green was appointed to a curacy at St. John's, Kensington and then in 1889 as rector of Charlton by Dover, an avowedly ritualist parish of which Keble College, Oxford was patron. He became Rector of Luddenham with Stone in Kent in 1914 but soon retired due to ill health. He died in Sydenham on August 11, 1916.