Sir Ian Macdonald Horobin (16 November 1899 – 5 June 1976) was a British Conservative Party politician, poet, and veteran of the First and Second World Wars. Horobin served as the Parliamentary Secretary to the Minister for Power from 1958 to 1959, but stood down from politics shortly before his conviction for indecent assault, for which he served four years in prison.

Horobin was the son of J. C. Horobin, the principal of Homerton College, Cambridge, and his wife, Maud Adeline née Ford (known after her second marriage as M. A. Cloudesley Brereton).^[1] He was educated at Highgate School and Sidney Sussex College, Cambridge.^[1]

Horobin initially served with the Royal Naval Reserve in World War I before joining the Royal Air Force.^[1] Upon the outbreak of the Second World War Horobin rejoined the Royal Air Force, and was promoted to squadron leader. In 1941 Horobin was captured by the Japanese and detained as a prisoner of war until his release in 1945. The Japanese tortured and beat Horobin after he refused to reveal the methods of escape by key prisoners led by Laurens van der Post, and he played an important role in facilitating morale among prisoners at the Soekaboemi prison camp after volunteering as the camp's hygiene officer.^[1]

In 1923, Horobin became the warden of the Mansfield House University Settlement in London's East End, which worked with vulnerable young men and children. Horobin helped raise over £500,000 for the settlement, and left it when he was elected as the National Member of Parliament (MP) for Southwark Central, a seat he held until 1935.^[1] Horobin returned to work at the settlement after the Second World War. He was given a knighthood in 1955 for his work at the institution.

Horobin stood in the Oldham West seat in the 1950 general election, where he lost to Labour's Leslie Hale. In 1951 Horobin successfully contested Oldham East, and held the seat with a narrow majority of 380 in the 1955 election. Horobin was the first member of the Conservative government to lose his seat at the 1959 general election.^[1][2]

Horobin presented two episodes of BBC radio's The Week in Westminster in 1932.^[3] In 1935 a judge found in favour of Horobin in a case of trespass at his home in Essex, Blue House Farm in Lambourne End. Horobin had put a gate across a lane leading to Hainault Forest having been disturbed by the parking of cars on the lane, and it had been torn down by a woman who claimed that it had always been used for this purpose. The judge ruled that the nature of the lane had not been that it was to be presumed a place to park vehicles.^[4] Horobin sold paintings from his collection at Sotheby's in March 1962.^[5]

It was announced on 29 March 1962 that Horobin was to receive a life peerage,^[6] but he withdrew his acceptance on 13 April,^[7] stating that the demands of the role would be too much for him.^[8]

Horobin moved to Tangier, Morocco, after his release from prison, and died there in 1976.^[1]

• The Pleasures of Planning (1935)
• Poems (1935)
• More Poems (1939)
• Collected Poems (1973)