The small island country with no official capital, whose government offices are in Yaren District, is Nauru.
Nauru is unusual because it has never formally designated a capital city. The country is divided into 14 districts, but it has no city-based municipal structure comparable to the capitals of most nations. Yaren District, on the southern coast, functions as the practical political center because it contains government buildings and the Parliament.
Calling Yaren the capital is therefore a useful shorthand, but technically it is a de facto capital rather than an official one. Yaren is a district and settlement area, not a legally proclaimed national capital. Government addresses commonly use “Yaren District, Republic of Nauru,” which reflects that distinction.
Nauru is a raised coral island of about 21 square kilometres in the central Pacific. Its population is spread mainly around the coastal belt, while much of the interior was transformed by phosphate mining. The country became independent on 31 January 1968 after a period of administration by Australia, New Zealand, and the United Kingdom.