| Jonzac | |
| Commune Status: | Subprefecture and commune |
| Image Coat Of Arms: | Blason ville fr Jonzac (Charente-Maritime).svg |
| Arrondissement: | Jonzac |
| Canton: | Jonzac |
| Insee: | 17197 |
| Postal Code: | 17500 |
| Population Demonym: | Jonzacais·e |
| Mayor: | Christophe Cabri[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Haute-Saintonge |
| Coordinates: | 45.4467°N -0.4336°W |
| Elevation M: | 40 |
| Elevation Min M: | 26 |
| Elevation Max M: | 87 |
| Area Km2: | 13.09 |
Jonzac (pronounced as /fr/; fr|label=[[Poitevin-Saintongese]]|Jhonzat) is a commune of the Charente-Maritime department, Nouvelle-Aquitaine, southwestern France. The historian Jean Glénisson (1921–2010) was born in Jonzac as well as the philosopher Jean Hyppolite (1907–1968).
The river Seugne flows northwest through the commune and crosses the town. The station of Jonzac has a direct connection the station Gare de Bordeaux-Saint-Jean.
Jonzac is located in the south of Charente-Maritime, with the department's capital La Rochelle 105 km to the northwest. The capital of the Nouvelle-Aquitaine region, Bordeaux, is 90 km to the southwest. 55 km to its east is Angoulême, capital of the neighbouring Charente department.