Itauba Reservoir
                    General data
- Name: Itauba Reservoir
 - Water system: Lagoa dos Patos
 - Water type: Artificial lake
 - Progression: Jacui River -> Guaiba River -> Lagoa dos Patos -> Rio Grande Channel -> Atlantic Ocean -> Planet Earth
 - Climates: Tropical
 - Continents: South America
 - Countries: Brazil
 
The Itaúba Reservoir is a reservoir and hydroelectric power plant located in Restinga Sêca, Brazil, known for its surrounding landscape and boat rides for day trips. It is part of a larger system of linked reservoirs and is being studied for the occurrence of the invasive alga Ceratium furcoides. The Itaúba Reservoir is part of a cascading system of reservoirs, meaning its water level and flow are linked to other reservoirs in the system.