Brunei-Muara District
Kampong Ayer consists of several small neighbourhoods which are officially designated as villages, the third- and lowest-level administrative divisions of Brunei; each has its own village head (). The villages are under a few mukims (subdistricts) of Brunei-Muara District, with "penghulu" as the "" head"." The mukims and villages administration in Kampong Ayer are overseen by the Brunei-Muara District Office.