| Allemanche-Launay-et-Soyer | |
| Commune Status: | Commune |
| Arrondissement: | Épernay |
| Canton: | Vertus-Plaine Champenoise |
| Insee: | 51004 |
| Postal Code: | 51260 |
| Mayor: | Bernard Champion[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Sézanne-Sud Ouest Marnais |
| Coordinates: | 48.605°N 3.788°W |
| Elevation M: | 77 |
| Area Km2: | 15.24 |
Allemanche-Launay-et-Soyer (in French pronounced as /almɑ̃ʃ lonɛ e swaje/) is a commune in the Marne department in northeastern France.