The Hallstein Commission is the European Commission that held office from 7 January 1958 to 30 June 1967. Its president was Walter Hallstein and held two separate mandates.

The European Commission (EC) is part of the executive of the European Union (EU). It operates as a cabinet government, with 27 members of the Commission headed by a President. It includes an administrative body of about 32,000 European civil servants. The commission is divided into departments known as Directorates-General (DGs) that can be likened to departments or ministries each headed by a Director-General who is responsible to a Commissioner.