William Cargill

William Cargill may refer to:


 * William Cargill (Berwick MP) (1813–1894; William Walter Cargill), Conservative Party politician
 * William Cargill (New Zealand politician) (1784–1860; William Walter Cargill), Scottish-born New Zealand settler and politician
 * William Wallace Cargill (1844–1909), American business executive and founder of Cargill, Inc