Ajman is the capital of the emirate of Ajman in the United Arab Emirates. It is the fifth-largest city in UAE after Dubai, Abu Dhabi, Sharjah and Al Ain. Located along the Persian Gulf, it is engulfed by the larger emirate of Sharjah in territory.

The Emirate of Ajman is one of the seven emirates of the United Arab Emirates. It joined the United Arab Emirates federation on December 2, 1971. It has an area of 259 square kilometers, which makes it the smallest of the emirates in terms of area, while its population of approximately 504,846 in 2017 according to the Federal Competitiveness and Statistics Center makes it the fourth most populous emirate in the country. It is named after the city of Ajman, which is its seat of government. The main landmass of the emirate is a semi-enclave, surrounded on the north, east, and south by the Emirate of Sharjah.