IMCA may refer to: Independent Mental Capacity Advocate, a service defined in the Mental Capacity Act 2005 International Marine Contractors Association, a trade association for offshore, marine and underwater engineering companies International Management Centres Association, an unaccredited institution of higher education based in Buckingham, UK International Motor Contest Association, a United States racing sanctioning body Investment Management Consultants Association (IMCA), the organization that confers the financial certifications of Certified Investment Management Analyst (CIMA) and Certified Private Wealth Advisor (CPWA) Islamic Movement of Central Asia, a guerrilla organization