ICOS (disambiguation)

ICOS was an American biotechnology company.

ICOS may also refer to:

• ICOS (gene), a gene which encodes the protein CD278
• Integrated Carbon Observation System, a research infrastructure
• Integrated cavity output spectroscopy, a type of laser absorption spectrometry
• International Council of Onomastic Sciences, an academic organization
• The International Council on Security and Development, an international think tank
• Irish Co-operative Organisation Society, a business association