| ID&CA | Inverter Distribution and Control Assembly 
| Others |
| IDCA | I Don't Care Anymore
| Others |
| IDCA | Illinois Debate Coaches
| Others |
| IDCA | Independent Diagnostic Clinics Association
| Others |
| IDCA | Independent Duty Corpsman Association
| Others |
| IDCA | India Development Coalition of America
| Others |
| IDCA | Indian Deaf Cricket Association
| Cricket |
| IDCA | Indian Diamond and Colorstone Association
| Others |
| IDCA | Industrial Design Council of Australia
| Others |
| IDCA | Integrated Dewar Cooler Assembly
| Others |
| IDCA | Interior Design Coalition of Arizona
| Others |
| IDCA | International Data Center Authority
| Others |
| IDCA | International Design and Communication Awards
| Others |
| IDCA | International Design Communication Awards
| Others |
| IDCA | International Design Conference Aspen
| Others |
| IDCA | International Design Conference at Aspen
| Others |
| IDCA | International Design Conference in Aspen
| Others |
| IDCA | International Development Centre for Africa
| Others |
| IDCA | International Development Cooperation Agency
| Others |
| IDCA | International Digestive Cancer Alliance
| Others |
| IDCA | International Dolphin Conservation Agreement
| Others |
| IDCA | Iowa Defense Counsel Association
| Others |
| IDCA | Islamic Dawah Centre of Australia
| Others |
| IDCA | Italian Districts by Castles Award
| Others |