John Arbuthnott, 9th Viscount of Arbuthnott, DL, JP (4 June 1806 – 26 May 1891) was a Scottish peer and soldier. Born at , he was the oldest son of John Arbuthnott, 8th Viscount of Arbuthnott and his wife Margaret, daughter of Walter Ogilvy, de jure 8th Earl of Airlie. In 1860, he succeeded his father as viscount. Arbuthnott was educated at Corpus Christi College, Oxford and matriculated on 28 June 1824.