| Ordonnac | |
| Commune Status: | Commune |
| Arrondissement: | Lesparre-Médoc |
| Canton: | Le Nord-Médoc |
| Insee: | 33309 |
| Postal Code: | 33340 |
| Mayor: | Stephane Korchef[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | Médoc Cœur de Presqu'île |
| Coordinates: | 45.3083°N -0.8344°W |
| Elevation M: | 15 |
| Elevation Min M: | 2 |
| Elevation Max M: | 35 |
| Area Km2: | 10.21 |
Ordonnac (in French pronounced as /ɔʁdɔnak/; Occitan (post 1500);: Ordonac) is a commune in the Gironde department in Nouvelle-Aquitaine, southwestern France.