The Danish Institute for International Studies (DIIS) is an independent public research institute based in Copenhagen, Denmark. It was established in 2003.

DIIS conducts and communicates multidisciplinary research on globalisation, security, development and foreign policy, and aims to be agenda-setting in research, policy and public debate. Its research is organised in five field groups covering conflict and political violence, global development and green transitions, foreign policy and diplomacy, migration, climate and conflict, and global security and worldviews. Under its legal mandate the institute continuously assesses Denmark's foreign policy situation and informs Danish media, politicians and the public about its findings.