| Château-Landon | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Château Landon.svg |
| Coordinates: | 48.15°N 2.7011°W |
| Insee: | 77099 |
| Postal Code: | 77570 |
| Arrondissement: | Fontainebleau |
| Canton: | Nemours |
| Mayor: | Valérie Lagille[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Gâtinais-Val de Loing |
| Elevation Min M: | 66 |
| Elevation Max M: | 116 |
| Area Km2: | 29.35 |
Château-Landon (in French pronounced as /ʃɑto lɑ̃dɔ̃/) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France. The commune contains the Souppes-sur-Loing quarry, where the bright white travertine stones for the construction of the Sacré-Cœur, Paris, were sourced. Formerly the seat of the canton of Château-Landon, it has been part of the canton of Nemours since 2015.
The inhabitants are called Chatellandonnais or Castellandonnais in French.