The Reef Islands are a loose collection of 16 islands in the northwestern part of the Solomon Islands province of Temotu. These islands have historically also been known by the names of Swallow Islands and Matema Islands.
The islands lie about 80 km (50 mi) north of Nendo, the largest of the Santa Cruz Islands. The center of the group is at approximately 10°12'36" S lat., 166°10'12" E. long.
The islands or atolls of the group are:
Numa Miombilou or "Great Reef" is one continuous shoal, extending about 25 km (16 mi) west of Nifiloli. About 10 km (6.2 mi) to the south of this shoal are 4 small coral reefs:
Separated from these groups are what are called the "outer islands":
The total population of the Reef Islands is about 5,600, according to 2003 estimates. This includes a Polynesian community, believed to be descendants of people from northern Tuvalu.
Two very different languages are spoken in the Reef Islands, both Oceanic, yet genealogically and typologically very different. The inhabitants of Pileni, Matema, Nupani and Nukapu, speak Vaeakau-Taumako (a.k.a. Pileni), a Polynesian outlier language. The remaining Melanesian (non-Polynesian) population speaks Äiwoo, a member of the Reefs–Santa Cruz group of Oceanic.
Coordinates: 10°15′S 166°10′E / 10.250°S 166.167°E