| Marchais-en-Brie | |
| Image Coat Of Arms: | Blason Marchais-en-Brie.svg |
| Arrondissement: | Château-Thierry |
| Canton: | Condé-en-Brie |
| Insee: | 02458 |
| Postal Code: | 02540 |
| Commune: | Dhuys-et-Morin-en-Brie |
| Coordinates: | 48.8847°N 3.4847°W |
| Elevation M: | 210 |
| Elevation Min M: | 112 |
| Elevation Max M: | 212 |
| Area Km2: | 12.78 |
| Population: | 330 |
| Population Date: | 2021 |
| Population Footnotes: | [1] |
Marchais-en-Brie (in French pronounced as /maʁʃɛ ɑ̃ bʁi/, literally Marchais in Brie) is a former commune in the department of Aisne in northern France. On 1 January 2016, it was merged into the new commune Dhuys-et-Morin-en-Brie.[2]
thumb|left|Napoleonic Wars reenactments, battle of Montmirail.