Field Marshal Sir Frederick Paul Haines, GCB, GCSI, CIE (10 August 1819 – 11 June 1909) was a British Army officer.

[1] He was promoted to lieutenant on 15 December 1840 and appointed aide-de-camp to General Sir Hugh Gough (his eldest brother's father-in-law) in 1843.

[12] Promoted to brevet major-general on 25 November 1864,[13] Haines returned to India to become General Officer Commanding the Mysore Division of the Madras Army in March 1865.

[19] He commanded the forces in India during the Second Anglo-Afghan War and successfully argued for a large force being made available before mobilisation occurred, but once the war started the Governor-General of India, Lord Lytton, was inclined to by-pass Haines and deal direct with commanders in the field, causing friction between the two men.

[7] Haines was offered a baronetcy for services to HM Government in India in 1880 but declined the honour due to his wife's failing health, presuming that it would be re-offered to him after her recovery.