| Largny-sur-Automne | |
| Commune Status: | Commune |
| Arrondissement: | Soissons |
| Canton: | Villers-Cotterêts |
| Insee: | 02410 |
| Postal Code: | 02600 |
| Mayor: | Meritxell Lefranc-Carbonnel[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.2611°N 3.0419°W |
| Elevation M: | 124 |
| Elevation Min M: | 67 |
| Elevation Max M: | 218 |
| Area Km2: | 9.53 |
Largny-sur-Automne is a commune in the Aisne department in Hauts-de-France in northern France.
The garden of Les Charmettes, dedicated to the philosopher Jean-Jacques Rousseau, was created by Auguste Castellant from 1891. The garden and the buildings and statues in it have been a listed monument since 2008.
The village church was built in the 12th and 13th centuries.