The Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH (English: German Corporation for International Cooperation GmbH), often shortened to simply GIZ, is a German development agency headquartered in Bonn and Eschborn that provides services in the field of international development cooperation and international education work. GIZ's main commissioning party is Germany's Federal Ministry for Economic Cooperation and Development (BMZ). Other commissioners include European Union institutions, the United Nations, the private sector, and governments of other countries. In its projects GIZ works with partners in national governments, actors from the private sector, civil society and research institutions. It is the organization's self-declared goal to deliver effective solutions that offer people better prospects and sustainably improve their living conditions.

GIZ was established on 1 January 2011, through the merger of three German international development organizations: the Deutscher Entwicklungsdienst (DED), the Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ), and Internationale Weiterbildung und Entwicklung (InWEnt). GIZ is one of the world's largest development agencies, with a business volume in excess of €3.1 billion in 2019 as well as 22,199 employees spread over more than 120 countries.

Additionally, in cooperation with the German Federal Employment Agency, GIZ operates the Centre for International Migration and Development (CIM), an agency specialized on international cooperation activities related to global labor mobility.