Landolt is a Swiss surname. It may refer to:
People Arlo U. Landolt (1935-2022), American astronomer Dennis Landolt (born 1986), American footballer Edmund Landolt (1846–1926), Swiss ophthalmologist who developed "Landolt C" Elias Landolt (1926–2013), Swiss botanist Hans Heinrich Landolt (1831–1910), Swiss chemist who discovered iodine clock reaction, also one of the founders of Landolt-Börnstein database Jaqueline Landolt, Swiss curler, European champion Kevin Landolt (born 1975), American footballer Richard B. Landolt, American admiral Salomon Landolt (1741–1818), Swiss officer, bailiff, agriculturist, and painter
Other Landolt–Börnstein, systematic data collection in physical sciences and engineering Landolt C, optotype developed by ophthalmologist Edmund Landolt Landolt & Cie, Swiss bank 15072 Landolt, asteroid, named after Arlo U. Landolt Mount Landolt, mountain in Antarctica, named after Arlo U. Landolt