[1] It comprises an archipelago which lies in Cenderawasih Bay off the north coast of Western New Guinea.

A magnitude 7.5 earthquake in 1979 caused serious destruction and a tsunami, killing 115 people.

[4] The Yapen Islands Regency in 2010 comprised twelve districts (distrik); however, by 2018 four additional districts has been created (Anotaurei, Pulau Kurudu, Pulau Yerui and Yawakukat), bringing the total to sixteen, which are subdivided into 165 administrative "villages".

The table also includes the name of the administrative centre of each district, the number of administrative villages in each district (160 rural kampung and 5 urban kelurahan in total) and its post code.

Serui has a tropical rainforest climate (Af) with heavy rainfall year-round.