Gustav zu Sayn-Wittgenstein
Gustav zu Sayn-Wittgenstein is the name of the following people:
- Gustav zu Sayn-Wittgenstein-Berleburg (1837–1889), German nobleman and member of parliament
- Gustav Albrecht zu Sayn-Wittgenstein-Berleburg (1907–1944), German nobleman
- Gustav zu Sayn-Wittgenstein-Hohenstein (1633–1701), German imperial count