William Arbuthnot
William Arbuthnot or Arbuthnott may refer to:
- Sir William Arbuthnot, [1st Baronet], Lord Provost of Edinburgh
- Sir William Arbuthnot, 3rd Baronet, major in the 18th Hussars
- William Arbuthnot (British Army officer), Major General in the 14th Hussars
- Sir [William Arbuthnot Lane, 1st Baronet], surgeon
- Sir William Arbuthnot Lane, 2nd Baronet, actor and producer
- Sir William Arbuthnot, 2nd Baronet
- William [Reierson Arbuthnot], British businessman and legislator
- William Urquhart Arbuthnot, British administrator in India