Magen (Hebrew: מָגֵן, lit. Shield) may refer to:
- Star of David, known in Hebrew as the Magen David
- Magen, Israel, a kibbutz in southern Israel
- Magen David Adom, Israel's emergency medical, disaster, ambulance and blood bank service
- HaMagen, a Jewish defense organization active during World War I
- MAGEN (security), a technology that prevents certain data from being displayed to unauthorized people