Leitz may refer to:
Companies Esselte Leitz GmbH & Co KG, German manufacturer of office products Ernst Leitz GmbH, German firm, now divided into: Leica Camera, manufacturer of cameras Leica Geosystems, manufacturer of geodetic equipment Leica Microsystems, manufacturer of microscopes and owner of the Leica brand Leica Biosystems, cancer diagnostics company
People Leitz (surname)