| Reignier-Ésery | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Reignier.svg |
| Arrondissement: | Saint-Julien-en-Genevois |
| Canton: | La Roche-sur-Foron |
| Insee: | 74220 |
| Postal Code: | 74930 |
| Mayor: | Lucas Pugin[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | CC Arve et Salève |
| Coordinates: | 46.1353°N 6.2692°W |
| Elevation Min M: | 410 |
| Elevation Max M: | 832 |
| Area Km2: | 25.08 |
| Demonym: | Reignerand, Reignerande |
Reignier-Esery (in French pronounced as /ʁɛɲe ezʁi/; before 2008: Reignier[2]) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. It belongs to the cross-border agglomeration of the "Grand Genève".
The commune has a railway station,, on the Aix-les-Bains–Annemasse line.