General data
- Name:
- Water system: Black sea
- Water type: River
- Progression: Black sea -> Mediterranean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Subtropical, Temperate
- Continents: Europe, Asia
- Countries: Bulgaria
The Dvoynitsa (Bulgarian: Двойница) is a 52 km long river in eastern Bulgaria that flows into the Black Sea.
The river takes its source under the name Lekarnitsa from a spring at an altitude of 440 m in the Eminska Planina division of the Balkan Mountains. It flows in northern direction in a deep forested valley until the village of Golitsa. It then turns in direction east–southeast for the duration of its remaining course, as it valley widens and divides the Kamchiyska Planina to the north and Eminska Planina to the south. The Dvoynitsa flows into the Black Sea in the northeastern outskirts of the town of Obzor. Due to the small gradient, the river forms many meanders.
Its drainage basin covers a territory of 479 km2.
