| Beaumont-sur-Oise | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Beaumont-sur-Oise (Val-d'Oise).svg |
| Coordinates: | 49.1431°N 2.2872°W |
| Arrondissement: | Pontoise |
| Canton: | L'Isle-Adam |
| Intercommunality: | Haut Val d'Oise |
| Mayor: | Jean-Michel Aparicio[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 23 |
| Elevation Max M: | 210 |
| Area Km2: | 5.60 |
| Insee: | 95052 |
| Postal Code: | 95260 |
Beaumont-sur-Oise (pronounced as /fr/, literally Beaumont on Oise) is a commune in the Val-d'Oise department in Île-de-France in northern France. The classical cellist Jean-Henri Levasseur (1764–1823) was born in Beaumont-sur-Oise.