William Arbuthnot

William Arbuthnot or Arbuthnott may refer to:


 * Sir William Arbuthnot, 1st Baronet (1766–1829), Lord Provost of Edinburgh
 * Sir William Arbuthnot, 3rd Baronet (1831–1889), major in the 18th Hussars
 * Sir William Arbuthnot Lane, 1st Baronet (1856–1943), surgeon
 * Sir William Arbuthnot Lane, 2nd Baronet (1897–1972), actor and producer
 * Sir William Arbuthnot, 2nd Baronet (1950–2021)
 * William Reierson Arbuthnot (1826–1913), British businessman and legislator
 * William Urquhart Arbuthnot (1807–1874), British administrator in India