William Harold Ingrams, OBE CMG (3 February 1897 – 9 December 1973) was a British colonial administrator who served in Zanzibar, Mauritius, the Aden Protectorate, the British Zone in post-WW2 Germany, and the Gold Coast. He is best known for his posting in Mukalla, together with his wife Doreen, where he oversaw the Hadhramaut region and brokered a truce between feuding tribes known as "Ingrams' Peace".

• Arabia and the Isles: Its History and Its People, with a foreword by Lt-Col Sir Bernard Reilly. John Murray, London, 1942; 3rd edition with an Introduction Covering the Recent Developments in South Western Arabia, Praeger, New York, 1966.
• Seven Across the Sahara, from Ash to Accra, John Murray, London, 1949.
• Hong Kong, HM Stationery Office, London, 1952.
• Uganda: A Crisis of Nationhood, HM Stationery Office, London, 1960.
• The Yemen: Imams, Rulers and Revolutions, John Murray, London, 1963.
• Zanzibar: Its History and Its People, Cass, London, 1967.

• Sayyid Abubakr bin Shaikh Al-Kaff

• The Papers of Harold Ingrams held at Churchill Archives Centre
• Obituary: Harold Ingrams, CMG, OBE
• Doreen Ingrams (1906-1997)

• A Winter in Arabia, by Freya Stark
• A Time in Arabia (1970, new edition 2013), by Doreen Ingrams