The term civil service can refer to either a branch of governmental service in which individuals are employed (hired) on the basis of professional merit as proven by competitive examinations; or the body of employees in any government agency apart from the military, which is a separate extension of any national government.

A civil servant or public servant is a person in the public sector employed for a government department or agency. The extent of civil servants of a state as part of the "civil service" varies from country to country. In the United Kingdom, for instance, only Crown (national government) employees are referred to as civil servants whereas county or city employees are not.

Many consider the study of service to be a part of the field of public administration. Workers in "non-departmental public bodies" (sometimes called "QUANGOs") may also be classed as civil servants for the purpose of statistics and possibly for their terms and conditions. Collectively a state's civil servants form its civil service or public service.

The French Civil Service (French: fonction publique française) is the set of civil servants (fonctionnaires) working for the French government.

Not all employees of the state and public institutions or corporations are civil servants; however, the media often incorrectly equate "government employee" or "employee of a public corporation" with fonctionnaire. For instance, most employees of RATP and SNCF (road and rail transport authorities) are not civil servants. The Civil Service is also sometimes incorrectly referred to as the administration, but, properly speaking, the administration is the compound of public administrations and public administrative establishments, not their employees.

About half of the civil servants are employed in the French public education system.

Most employment positions in the French civil service are open to citizens of the European Union. Others, especially in police and justice, are specifically reserved for nationals, while a minority are open regardless of citizenship.