Balco can refer to:
- the Bay Area Laboratory Co-operative (BALCO) - a controversial sports medicine/nutrition centre in Burlingame, California.
- Balco balcony systems who develops, designs and manufactures balcony systems and glazing solutions.
- the Balco Engine number - a unique identifier for an automobile engine.
- a nickel-iron alloy used as a probe in Resistance Temperature Detectors.
- Bharat Aluminium Company, an Indian aluminium company.
- Baltimore County, Maryland