ICSN
| Acronym | Definition |
|---|---|
| ICSN | Indo-China Steam Navigation Co. (shipping company) |
| ICSN | Idaho Charter School Network |
| ICSN | International Cancer Screening Network (National Cancer Institute) |
| ICSN | International Center for Sports Nutrition (Omaha, NE) |
| ICSN | International Conference on Survey Nonresponse (est. 1999) |
| ICSN | International Contact Support Network (alien encounters) |