Peter Waite (9 May 1834 – 4 April 1922) was a South Australian pastoralist, businessman, company director and public benefactor. Waite's philanthropic endeavors provided significant benefit to the University of Adelaide and to local public schools, and generations of students have benefited from his largesse.
Waite was born at Kirkcaldy, Fife, Scotland, son of James Waite, a farmer, and his wife Elizabeth, née Stocks. Waite was left fatherless and after leaving school he was apprenticed to an ironmonger and spent nine years in commercial pursuits. Waite then sailed to Australia aboard the British Trident, landed at Melbourne and went on to South Australia. There he joined his brother James who was part owner of Pandappa station near Terowie. Waite worked on this station for some years and acquired a thorough knowledge of the pastoral industry. Waite then (in conjunction with Sir Thomas Elder) bought Paratoo station, and gradually obtained interests in other properties. He was one of the first to realize the value of fenced as against open runs, and spent over £200,000 in fencing and providing water. He later owned Momba Station, one of the largest sheep stations in outback New South Wales. Waite and other pastoralists in the area formed the Pastoralists' Association of West Darling in 1906.
On 21 November 1864 Waite married his first cousin Matilda Methuen (d.1922), a daughter of James Methuen of Leith, Scotland. Together they had eight children. For many years he lived in the country and kept a strict eye on the management of his various properties. Later he was able to hand over much of this management to his son, while he conducted business in Adelaide. He thoroughly understood the needs of pastoralists, and in 1883 became chairman of Elder's Wool & Produce Co. Ltd, a subsidiary Elder Smith and Company. In 1888 the two companies were amalgamated and he became chairman of directors of Elder Smith & Co. Ltd, "displaying remarkable ingenuity and initiative". He held this position for 34 years, resigning a few months before his death. Waite was also Managing Director of the Beltana Pastoral Co. Ltd and the Mutooroo Pastoral Co. Ltd. He held directorships with the Commercial Union Assurance Co. Ltd, the British Broken Hill Co. Ltd, and the S.A. Woollen Co. Ltd.