| Lagoa Azul | |
| Location: | Northwestern Lobata District, São Tomé, São Tomé and Príncipe |
| Coords: | 0.4063°N 6.6103°W |
| Pushpin Map: | Sao Tome |
| Pushpin Map Caption: | Lagoa Azul at the north of São Tomé Island |
| Type: | bay |
Lagoa Azul (Portuguese for "blue lagoon") is a small bay in the northern part of the island of São Tomé in São Tomé and Príncipe. It is part of the Parque Natural Obô de São Tomé.[1] It is 4 km northwest of the town Guadalupe. It is a popular spot for diving.[2] There is a lighthouse near the bay, built in 1997.[3]