Bahrain ( pronunciation) (Arabic: ‏البحرين‎, al-Baḥrayn) (Persian: ‏بحرين‎, Baḥrain), officially the Kingdom of Bahrain (Arabic: مملكة البحرين‎,  Mamlakat al-Baḥrayn), is a small island state near the western shores of the Persian Gulf. It is ruled by the Al Khalifa royal family. The population in 2010 stood at 1,234,571, including 666,172 non-nationals. Formerly an emirate, Bahrain was declared a kingdom in 2002.

Bahrain is an archipelago of 33 islands, the largest being Bahrain Island, at 55 km (34 mi) long by 18 km (11 mi) wide. Saudi Arabia lies to the west and is connected to Bahrain by the King Fahd Causeway. The peninsula of Qatar is to the southeast across the Gulf of Bahrain. The planned Qatar Bahrain Causeway will link Bahrain and Qatar and become the world's longest marine causeway.

Known for its oil and pearls, Bahrain is also home to many large structures, including the Bahrain World Trade Center and the Bahrain Financial Harbour, with a proposal in place to build the 1,022 m (3,353 ft) high Murjan Tower. The Qal'at al-Bahrain (the harbour and capital of the ancient land of Dilmun) was declared a UNESCO World Heritage Site in 2005. The Bahrain Formula One Grand Prix takes place at the Bahrain International Circuit.