The Civil Aid Service (Department) is a government department under the Security Bureau. It has an establishment of 108 full-time staff embracing a Directorate, departmental officers and general grade staff. They perform and provide operational control, service training, administrative and logistic support to the members of the Service.
The Civil Aid Service is a uniformed and disciplined, government-financed, auxiliary service. The Service has an establishment of 3,770 adult members and 4,032 youths aged from 12 to 17. It was formed in 1952 as a wartime-oriented civil defense unit. Since then, it has grown into a multi-tasked auxiliary organisation, capable of undertaking a wide range of emergency duties and helping to relieve the pressure on Hong Kong's full-time emergency forces.