| Location | States or Territories | Abbreviation | Postcode |
|---|---|---|---|
| Idalia | Queensland | QLD | 4811 |
| Ideraway | Queensland | QLD | 4625 |
| Ilbilbie | Queensland | QLD | 4738 |
| Ilfracombe | Queensland | QLD | 4727 |
| Ilkley | Queensland | QLD | 4554 |
| Illinbah | Queensland | QLD | 4275 |
| Image Flat | Queensland | QLD | 4560 |
| Imbil | Queensland | QLD | 4570 |
| Inala | Queensland | QLD | 4077 |
| Inala Heights | Queensland | QLD | 4077 |
| Indooroopilly | Queensland | QLD | 4068 |
| Indooroopilly Centre | Queensland | QLD | 4068 |
| Ingham | Queensland | QLD | 4850 |
| Inglestone | Queensland | QLD | 4422 |
| Inglewood | Queensland | QLD | 4387 |
| Ingoldsby | Queensland | QLD | 4343 |
| Injinoo | Queensland | QLD | 4876 |
| Injune | Queensland | QLD | 4454 |
| Inkerman | Queensland | QLD | 4806 |
| Innes Park | Queensland | QLD | 4670 |
