Bahrain, officially the Kingdom of Bahrain, is a country in the Persian Gulf. The island nation comprises a small archipelago made up of 51 natural islands and an additional 33 artificial islands, centered around Bahrain Island which make up around 83 percent of the country's landmass. The country is situated between the Qatari peninsula and the north eastern coast of Saudi Arabia to which it is connected by the 25-kilometre (16 mi) King Fahd Causeway. According to the 2010 census, Bahrain's 2020 population is estimated at 1,701,575 people mid-year according to UN data. Half of people counted are non-nationals willing to report their status. At 780 square kilometres (300 sq mi) in size, it is the third-smallest nation in Asia after the Maldives and Singapore. The capital and largest city is Manama.