| Lyra Reef | |
| Location: | Solomon Sea |
| Island Type: | Reef |
| Pushpin Map: | Papua New Guinea#Pacific Ocean |
| Pushpin Label: | Lyra Reef |
| Pushpin Relief: | 1 |
| Pushpin Map Caption: | Location of Lyra Reef north-east of Papua New Guinea |
| Coordinates: | -1.75°N 173°W |
| Country: | Papua New Guinea |
| Timezone1: | AEST |
| Utc Offset1: | +10 |
Lyra Reef is a remote submerged coral atoll, about 40km (30miles) in diameter, extending over an area of 1300km2. It lies about 200km (100miles) north-east of New Ireland in the Bismarck Archipelago of Papua New Guinea, and 150km (90miles) north-east of Simberi Island, the closest island, and about the same distance north-west of the Nuguria Islands.
The depths around the perimeter of the reef are generally less than 37m (121feet) and in places are less than 11m (36feet). The least depth is 6.1m (20feet) on its north side. Within the reef, in the lagoon, there are depths of exceeding 183m (600feet). A gap on the north-west side of the reef gives access to this deep water. Depths of more than 2700m (8,900feet) are found within 8km (05miles) of the reef.
