The Ogosta (Bulgarian: Огоста, Latin Augusta), is a river in Northern Bulgaria, a right tributary of the Danube. It takes it source from Vrazha Glava Peak (935 m) on the border with Serbia. The towns of Chiprovtsi, Montana and Miziya are situated on the river's banks.
The Ogosta river is 147.4 km in length and is fed by 40 tributaries in a watershed of 3157 square kilometres. Along the river's length there are 14 irrigation systems, 8 hydropower plants and 13 dams.
Although the river is used for domestic consumption it does suffer from pollution from agriculture and factories along its banks.
The main source of income aided by the river is by farmers who breed livestock and use the water to water their livestock and grow vegetation for the livestock to eat.
Ogosta Point on Livingston Island in the South Shetland Islands, Antarctica is named after Ogosta.