is the capital and the second most populous city of the United Arab Emirates (after Dubai). It is the largest of the UAE's seven emirates and also capital of the Emirate of Abu Dhabi. Abu Dhabi city is on an island in the Persian Gulf off the central western coast, while most of the city and Emirate reside on the mainland connected to the rest of the country. As of 2019, Abu Dhabi's urban area has an estimated population of 1.45 million, out of 2.9 million in the emirate of Abu Dhabi, as of 2016.
Abu Dhabi houses local and federal government offices and is the seat of the United Arab Emirates Government and the Supreme Oil Council. The city is home to the President of the UAE, who is a member of the Al Nahyan family. Abu Dhabi's rapid development and urbanization, coupled with the massive oil and gas reserves and production and relatively high average income, have transformed it into a large, advanced metropolis. It is the country's centre of politics and industry, and a major culture and commerce centre. Abu Dhabi accounts for about two-thirds of the roughly $400 billion UAE economy.