Niue is an island country in the South Pacific Ocean, 2400 km northeast of New Zealand, east of Tonga, south of Samoa, and west of the Cook Islands. Niue's land area is about 261 km2 and its population, predominantly Polynesian, was about 1,600 in 2016. The island is commonly referred to as "The Rock", which comes from the traditional name "Rock of Polynesia". Niue is one of the world's largest coral islands. The terrain of the island has two noticeable levels. The higher level is made up of a limestone cliff running along the coast, with a plateau in the centre of the island reaching approximately 60 metres (200 feet) high above sea level. The lower level is a coastal terrace approximately 0.5 km (0.3 miles) wide and about 25–27 metres (80–90 feet) high, which slopes down and meets the sea in small cliffs. A coral reef surrounds the island, with the only major break in the reef being in the central western coast, close to the capital, Alofi. A notable feature are the many limestone caves near the coast.
Niue is a self-governing state in free association with New Zealand; and New Zealand conducts most diplomatic relations—though not all—on its behalf. Niueans are citizens of New Zealand, and Queen Elizabeth II is head of state in her capacity as Queen of New Zealand. Between 90% and 95% of Niuean people live in New Zealand, along with about 70% of the speakers of the Niuean language. Niue is a bilingual country, with 30% of the population speaking both Niuean and English, though the percentage of monolingual English-speaking people is only 11%, while 46% are monolingual Niuean speakers.