Landaff

Landaff may refer to:


 * Landaff, New Hampshire, a town in Grafton County
 * Landaff Andrews (1803–1888), United States Representative from Kentucky
 * Earl Landaff, a title in the Peerage of Ireland
 * Francis Mathew, 1st Earl Landaff (1738–1806)
 * Francis Mathew, 2nd Earl Landaff (1768–1833)