| Abbreviation | Definition |
|---|---|
| HSNC | Humane Society of Navarro County |
| HSSC | Humane Society of Summit County |
| HSSLC | Humane Society of St Lucie County |
| HYCC | Healthy York County Coalition |
| IAC | Idaho Association of Counties |
| IACC | Islamic Association of Collin County |
| ICARS | Iredell County Amateur Radio Society |
| ICARUS | Inter County Arson Reduction Usernet System |
| ICATS | Iredell County Area Transit System |
| ICATS | Iredell County Area Transportation System |
| ICBA | Ingham County Bar Association |
| ICBA | Inter County Baseball Association |
| ICBA | Inter County Basketball Association |
| ICBL | Inter County Basketball League |
| ICBN | Inter County Broadband Network |
| ICCF | Ionia County Community Foundation |
| ICCF | Iosco County Community Foundation |
| ICDC | Itawamba County Dev Council |
| ICDC | Itawamba County Development Council |
| ICFC | Imperial County Film Commission |