After hours of research, as suspected, the population of the capital city of Palau is 0.
Alii and greetings from Palau.
Ngerulmud is the name of the area where the Palau capitol is located. There’s no people living in this area, only administrative buildings (Executive, Legislative, and Judiciary). I have attached a map of Melekok State showing Ngerulmud boundaries within the state.
Thank you and please email back should you need more information.
Office of Planning and Statistics,
Bureau of Budget and Planning,
Ministry of Finance