Curt Walter Gasteyger (born 20 March 1929 in Zurich, died 14 July 2020 in Geneva) was a Swiss legal scholar who specialised in questions of international security and disarmament.
He was also the founder and director of the Programme for Strategic and International Security Studies.
Gasteyger participated in the Volcker Commission, established to investigate the many dormant accounts opened by Jews fleeing Nazi persecution in Swiss Banks.
In 2003, he was awarded the Great Cross of Merit of the Federal Republic of Germany (Bundesverdienstkreuz).
Gasteyer is buried at the Cimetière des Rois (Cemetery of Kings), which is considered the Genevan Panthéon.