ICA can refer to:

• Empresas ICA Sociedad Controladora - Mexican construction company.
• Independent components analysis (signal processing)
• Institute of Contemporary Arts - a performance venue in London
• International Council on Archives
• Independent Computing Architecture
• International Cartographic Association
• International Co-operative Alliance - the worldwide umbrella body for co-operatives
• ICA AB - a retail grocery chain in Scandinavia
• Intercontinental A (karting)
• The Citrix Independent Computing Architecture
• Investment Company of America