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)
See also
Landulf, a masculine given name Llandaff, a district, community and electoral ward in Cardiff, Wales, United Kingdom