Leica may refer to:
- Leica Camera AG, a German camera and optics manufacturer
- Leica Geosystems AG, a company in eastern Switzerland that produces surveying and geomatics equipment
- Leica Microsystems GmbH, a German company that produces microscopes and other precision optics
- A song by the band Faceless, appearing on their album, "Akeldama (The Faceless album)".