| Official Name: | Tvarditsa |
| Native Name: | Твърдица |
| Settlement Type: | Village |
| Pushpin Map: | Bulgaria |
| Pushpin Map Caption: | Location in Bulgaria |
| Subdivision Type: | Country |
| Subdivision Name: |  Bulgaria |
| Subdivision Type1: | Province |
| Subdivision Name1: | Burgas Province |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Burgas Municipality |
| Population As Of: | 2022 |
| Population Total: | 496 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 42.4097°N 27.4583°W |
| Native Name Lang: | bg |
Tvarditsa is a village in Burgas Municipality in southeastern Bulgaria.[1]
According to the 2022 census the village has 496 people.[2]