The Tundzha (Bulgarian: Тунджа [ˈtund͡ʒɐ], Turkish: Tunca [tund͡ʒa], Greek: Τόνζος [ˈtonzos]) is a river in Bulgaria and Turkey (known in antiquity as the Tonsus) and the most significant tributary of the Maritsa, emptying into it on Turkish territory near Edirne.

Tundzha, Tunca
The Tunca River at Edirne, Turkey
CountryBulgaria, Turkey
Physical characteristics
 • locationeast of Botev Peak, Stara Planina, Bulgaria
 • coordinates42°43′40″N 24°58′10″E / 42.72778°N 24.96944°E / 42.72778; 24.96944
 • elevation1,940 m (6,360 ft)
 • location
Maritsa at Edirne, Turkey
 • coordinates
41°39′42″N 26°33′44″E / 41.6616°N 26.5622°E / 41.6616; 26.5622 (Tundzha River mouth)Coordinates: 41°39′42″N 26°33′44″E / 41.6616°N 26.5622°E / 41.6616; 26.5622 (Tundzha River mouth)
Lengthca. 365 km (227 mi) (328.4 km (204.1 mi) in Bulgaria)[1]
Basin sizeca. 8,430 km2 (3,250 sq mi) (7,891 km2 (3,047 sq mi) in Bulgaria)[1]
Basin features
ProgressionMaritsaAegean Sea

The river takes its source from the central parts of Stara Planina north of Kalofer, it then flows east and makes a sharp turn to the south before Yambol, in which direction it flows until it reaches the Maritsa. The Tundzha's length is about 365 km, of which 328 km on Bulgarian territory (including border). It has about 50 tributaries, the more important of which Mochuritsa, Popovska and Sinapovska.

Towns on the banks of the river include Kalofer, Yambol and Elhovo.


Tundzha Glacier on Livingston Island in the South Shetland Islands, Antarctica is named after Tundzha River.


Pictures of Tundzha River in Yambol:

Tundzha River in Yambol, Bulgaria - The Bridge that connects former Mineral Public Bath and Hotel Tundzha with the City Park
Tundzha River in Yambol, Bulgaria - near the City Stadium and the City Park

Pictures of Tundzha River near Elhovo: