A Zwinger is part of a medieval castle or town fortification. It may also refer to:
Fortifications and enclosures Zwinger (Goslar), a battery tower in the town fortifications of Goslar Zwinger (Münster), part of the town fortifications of Münster Zwinger (Dresden), a stately building and park area with museums in Dresden
People with the surname Gustav Philipp Zwinger (1779–1819), German artist, etcher and lithographer Thorsten Zwinger (born 1962), German artist Theodor Zwinger (1533–1588), Swiss physician and Christian humanist scholar