John Richardson Illingworth (26 June 1848 – 22 August 1915) was an English Anglican priest, philosopher, and theologian. He was a notable member of the set of liberal Anglo-Catholic theologians based in Oxford, and he contributed two chapters to the influential Lux Mundi.^[6][7]

Illingworth was born in London on 26 June 1848^[8] to an Anglo-Catholic family,^[9] the second son of Edward Arthur Illingworth (1807–1883), chaplain to Middlesex House of Correction,^[10] and his wife, Mary Taylor.^[11] He was educated at St Paul's School, an all-boys public school in London.^[12] As a child, he worshipped at St Alban's Church, Holborn, and at All Saints, Margaret Street.^[12] He won both an exhibition and a scholarship to attend the University of Oxford.^[13] He then studied literae humaniores (classical studies) at Corpus Christi College, Oxford, and achieved first-class honours in both mods and greats,^[14] graduating in 1871 with a Bachelor of Arts (BA) degree.^[15]

In 1900, Illingworth was awarded an honorary Doctor of Divinity (DD) degree by the University of Edinburgh.^[16][17]

From 1872 to 1883, Illingworth was a Fellow and Tutor of Jesus College, Oxford, and a Tutor of Keble College, Oxford.^[18] He was ordained in the Church of England as a deacon in 1875 and as a priest in 1876.^[19] From 1883 until his death, he was Rector of St Mary's Church, Longworth in the Diocese of Oxford.^[18] He was also a Select Preacher of the University of Oxford from 1882 to 1891 and of the University of Cambridge from 1884 to 1895.^[18] In 1894, he gave the Bampton Lectures at the University of Oxford; the series was titled "Personality, Human and Divine".^[20] He was made an honorary canon of Christ Church, Oxford, on 6 February 1905.^[21]

In June 1883, Illingworth became engaged to Agnes Louisa Gutteres.^[22] They were married at St Bartholomew's Church in Nymet Rowland, Devon, on 2 August 1883.^[23]

Illingworth died on 22 August 1915 in Longworth, aged 67,^[24] and was buried at St Mary's Church.^[25]

• Illingworth, J. R. (1881). Sermons Preached in a College Chapel. London: Macmillan and Co.
• Illingworth, J. R. (1889). "The Problem of Pain: Its Bearing on Faith in God". In Gore, Charles (ed.). Lux Mundi.
• Illingworth, J. R. (1889). "The Incarnation in Relation to Development". In Gore, Charles (ed.). Lux Mundi.
• Illingworth, J. R. (1893). University and Cathedral Sermons. London: Macmillan and Co.
• Illingworth, J. R. (1894). Personality, Human and Divine: Being the Bampton Lectures for the Year 1894. London: Macmillan and Co.
• Illingworth, J. R. (1898). Divine Immanence: An Essay on the Spiritual Significance of Matter. London: Macmillan and Co.
• Illingworth, J. R. (1902). Reason & Revelation: An Essay in Christian Apology. London: Macmillan and Co.
• Illingworth, J. R. (1907). The Doctrine of the Trinity Apologetically Considered. London: Macmillan and Co.
• Illingworth, J. R. (1911). Divine Transcendence and Its Reflection in Religious Authority. London: Macmillan and Co.
• Illingworth, J. R. (1915). The Gospel Miracles: An Essay with Two Appendices. London: Macmillan and Co.