Tvarditsa Municipality | |
|---|---|
Municipality | |
 Coat of arms | |
.png) Location of Tvarditsa Municipality in Sliven Province | |
  Tvarditsa Municipality Location of Tvarditsa Municipality in Bulgaria | |
| Coordinates: 42°42′N 25°54′E / 42.700°N 25.900°E | |
| Country |  Bulgaria |
| Province | Sliven Province |
| Capital | Tvarditsa |
| Area | |
| • Total | 442.5 km2 (170.9 sq mi) |
| Population (2011) | |
| • Total | 13,804 |
| • Density | 31/km2 (81/sq mi) |
| Postal code | 8890 |
| Area code | 0454 |
Tvarditsa Municipality (Bulgarian: Община Твърдица) is a municipality in the Sliven Province of Bulgaria.