In 1883, Bonython was elected chairman of the Adelaide School Advisory Board. In 1889 he became the president of the council for the South Australian School of Mines and Industries, a position he held until his death. He often assisted the school with his own money. Bonython joined the council of the
University of Adelaide in 1916, and donated over £50,000 for the construction of a hall, and £20,000 to fund a
Chair in
law. From 1916 to 1926, Bonython was also the deputy chairman of the South Australian advisory council of education. He donated £100,000 towards the construction of
Parliament House in Adelaide. In 1919, he was appointed
Knight Commander of the Order of St Michael and St George (KCMG) "In recognition of service to the Commonwealth". Bonython was vice-president of the
Royal Institution of Cornwall from 1900 until becoming president from 1932 to 1933, succeeding
Viscount Falmouth. Despite living in Australia, and being unable to visit Cornwall during his presidency, he became one of the most active and hard working presidents that the institution had had. In 1931, he donated £2,000 to the
Royal Cornwall Museum building fund and the Bonython gallery on the ground floor was named in his honour. His wife, Lady Bonython, was also active in altruistic causes, notably the Kindergarten Union and State Children's Council, in association with
Catherine Helen Spence and
C. Emily Clark. ;Bonython Hall: ==Legacy==