government and public offices; public agency
A collective term for national and local government offices, as well as public agencies. Often used in legal or administrative contexts.
You need to complete the procedure at a government or public office.
役所 is a more common, everyday word for a public office or city hall, whereas 官公署 is a formal, collective term used mainly in legal or administrative contexts.
Compound of 官 (government), 公 (public), and 署 (office). The exact historical derivation is uncertain, but the term is conventionally used to refer collectively to government and public offices.