Thomas Dunn (28 July 1870 – 21 September 1931) was an English prelate of the Roman Catholic Church. He served as Bishop of Nottingham from 1916 until his death in 1931.
Born in London on 28 July 1870, he was ordained to the priesthood on 2 February 1893.
On 3 January 1916, Dunn was appointed the fifth Bishop of Nottingham by Pope Benedict XV. He received his episcopal consecration on the following 25 February from Cardinal Francis Bourne, Archbishop of Westminster, with Bishops Peter Amigo of Southwark and William Cotter of Portsmouth serving as co-consecrators.
Dunn died in office on 21 September 1931, aged 61.