William Grierson

William Grierson may refer to:
 * Sir William Grierson, 2nd Baronet (c. 1677–1760), Scottish Jacobite, MP for Dumfriesshire 1709–1711
 * William Grierson (engineer) (1863–1935), British civil engineer, president of the Institution of Civil Engineers from 1929–30
 * William Grierson (footballer) (born 1998), Filipino footballer