Armando Ribeiro Goncalves Reservoir
General data
- Name: Armando Ribeiro Goncalves Reservoir
- Water system: Piranhas River
- Water type: Artificial lake
- Progression: Piranhas River -> Atlantic Ocean -> Planet Earth
- Climates: Tropical, Subtropical, Temperate, Subpolar, Polar
- Continents: South America
- Countries: Brazil
Armando Ribeiro Gonçalves Reservoir is the largest reservoir in Rio Grande do Norte state. Total capacity is about 2,373,066,000 m³ (≈ 2.37 billion m³). It is located on the Rio Piranhas‑Assú, between municipalities including Assú, Itajá, São Rafael.