William Macartney

William Macartney may refer to:


 * William Macartney (1714–1793), MP for Belfast
 * Sir William Isaac Macartney, 2nd Baronet (1780–1867), of the Macartney baronets
 * William Ellison-Macartney (1852–1924)
 * Sir William Isaac Macartney, 4th Baronet (1867–1942), of the Macartney baronets