John Arbuthnott, 8th Viscount of Arbuthnott DL FRSE (16 January 1778 – 10 January 1860) was a Scottish peer and soldier. Known as "the rich Lord" he built the bridge in front of Arbuthnott House, Kincardineshire. He was the first member of the family who consistently spelled his name "Arbuthnott" rather than "Arbuthnot".