| Abbreviation | Definition |
|---|---|
| ICOP | Islamic Crescents Observation Project |
| ICPC | Islamic Center of Passaic County |
| ICR | Institute For Creation Research |
| ICRO | Islamic Culture and Relations Organization |
| ICRP | Indonesian Conference on Religion and Peace |
| ICRS | International Christian Retail Show |
| ICS | Intercontinental Church Society |
| ICS | International Christian School |
| ICSB | International Christian School of Budapest |
| ICSB | Islamic Center of South Bay - Los Angeles |
| ICSC | International Catholic Stewardship |
| ICSD | Islamic Center of San Diego |
| ICSF | Islamic Center of San Francisco |
| ICSG | Interfaith Center for Spiritual Growth |
| ICSJ | Immaculate Conception and St. Joseph Church |
| ICSJ | International Community of St. John the Devine |
| ICSJ | Islamic Center of South Jersey |
| ICSL | Institute for Catholic School Leaders |
| ICSL | International Christian School Of Lomé |
| ICSN | Integrity Christian Singles Network |