| ISGP | Independent School Gender Project 
| Others |
| ISGP | Indigenous Sports Grants Program
| Others |
| ISGP | Industrial Stormwater General Permit
| Others |
| ISGP | Infertility Support Group of Pakistan
| Others |
| ISGP | Information Systems Graduate Programs
| Others |
| ISGP | Innovative Seed Grant Program
| Others |
| ISGP | Institute for Studies in Global Prosperity
| Others |
| ISGP | Institute on Science for Global Policy
| Others |
| ISGP | Institutional Strengthening of Gram Panchayats
| Others |
| ISGP | Interdisciplinary Studies Graduate Program
| Others |
| ISGP | International Society for Gravitational Physiology
| Others |
| ISGP | International Society of Gynecological Pathologists
| Others |
| ISGP | Islamic Society of Greater Portland
| Others |