| IEEs | Initial Environmental Enquiries 
| Others |
| IEES | Inland Empire Emerald Society
| Others |
| IEES | Institute for Energy and Environmental Sustainability
| Others |
| IEES | Institute of ecology and environmental sciences
| Others |
| IEES | Institute of Ecology and Environmental Studies
| Others |
| IEES | Institute of Environment Energy and Sustainability
| Others |
| IEES | Instituto Electoral del Estado de Sinaloa
| Others |
| IEES | International Ecological Engineering Society
| Others |
| IEES | International Entrepreneurship Education Summit
| Others |