The Capital Region is a region in southwestern Iceland that comprises the national capital Reykjavík and six municipalities around it. Each municipality has its own elected council. Municipal governments in the region cooperate extensively in various fields: for example waste policy, shared public transport and a joint fire brigade. The region is home to 64% of Iceland's population.

Reykjavík is the capital and largest city of Iceland. It is located in southwestern Iceland, on the southern shore of Faxaflói bay. Its latitude is 64°08′ N, making it the world's northernmost capital of a sovereign state. Reykjavík has a population of around 140,000 as of 2023. The Capital Region has a population of around 248,000.