Otava River
                    General data
- Name: Otava River
 - Water system: Elbe
 - Water type: River
 - Source: Vydra River
 - Progression: Vltava -> Elbe -> North Sea -> Atlantic Ocean -> Planet Earth
 - Climates: Continental
 - Continents: Europe
 - Countries: Czech Republic
 
The Otava is a river in the Czech Republic, a left tributary of the Vltava River. It is formed by the confluence of the Vydra and Křemelná rivers. Together with the Vydra, which is its main source, the Otava is 134.8 km long, making it the 13th longest river in the country. Without the Vydra, it is 111.7 km long.