| ICT CENTRE (Information and Communica... | Government - Australian | Marsfield | 2122 | NSW |
| Illoura Child & Family Counselling Se... | Government - State | Beaudesert | 4285 | QLD |
| Immigration South Australia | Government - State | Adelaide | 5000 | SA |
| Independent Commission Against Corrup... | Government - State | Sydney | 2001 | NSW |
| Independent Competition And Regulator... | Government - State | Canberra City | 2601 | ACT |
| Independent Gambling Authority | Government - State | Adelaide | 5000 | SA |
| Independent Market Operator | Government - State | Perth | 6000 | WA |
| Independent Pricing & Regulatory Trib... | Government - State | Sydney | 2000 | NSW |
| Independent Transport Safety and Reli... | Community Services, Government - State | Sydney | 1235 | NSW |
| INDIGENOUS BUSINESS AUSTRALIA | Government - Australian | Woden | 2606 | ACT |
| Indigenous Coordination Centres | Government - Australian, Commonwealth | Darwin | 800 | NT |
| INDIGENOUS LAND CORPORATION | Government - Australian | Adelaide | 5000 | SA |
| INDIGO SHIRE COUNCIL | Government - Local | Beechworth | 3747 | VIC |
| Industrial Relations Commission Of NS... | Government - State | Sydney | 2000 | NSW |
| INDUSTRIAL RELATIONS COURT OF AUSTRAL... | Government - Australian | Queens Squ | 2000 | NSW |
| Industrial Relations Victoria | Government - State | Melbourne | 3001 | VIC |
| Industry Capability Network | Government - State | Hobart | 7001 | TAS |
| Industry Research and Development Boa... | Government - Australian, Commonwealth | Canberra | 2601 | ACT |
| Infectious Diseases Epidemiology & Su... | Government - State | Melbourne | 3001 | VIC |
| Information Industries Bureau | Government - State | City East | 4001 | QLD |
