| Lake Lumao | |
| Pushpin Map: | Philippines |
| Pushpin Map Caption: | Location within the Philippines |
| Location: | Agusan del Sur |
| Coordinates: | 8.4444°N 125.7731°W |
| Type: | lake |
| Inflow: | Agusan River |
| Basin Countries: | Philippines |
| Area: | 16.8km2 |
Lake Lumao is a lake located in the Agusan Valley in the province of Agusan del Sur, Philippines. The Agusan River is its main tributary.[1]
With an area of about, it is the tenth-largest lake in the Philippines.