| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Idanha | city | Oregon | United States | 44.70 | -122.08 | 1801 | |
| Idaville | city | Oregon | United States | 45.51 | -123.87 | 52 | |
| Idleyld Park | city | Oregon | United States | 43.32 | -123.02 | 1023 | |
| Igo (historical) | city | Oregon | United States | 45.25 | -120.28 | 3349 | |
| Illahe | city | Oregon | United States | 42.63 | -124.06 | 830 | |
| Imbler | city | Oregon | United States | 45.46 | -117.96 | 2700 | |
| Imnaha | city | Oregon | United States | 45.56 | -116.83 | 2509 | |
| Imnaha River Woods Development | city | Oregon | United States | 45.26 | -116.80 | 5029 | |
| Imperial (historical) | city | Oregon | United States | 43.75 | -120.44 | 4498 | |
| Independence | city | Oregon | United States | 44.85 | -123.19 | 196 | |
| Indian Valley (historical) | city | Oregon | United States | 45.52 | -117.88 | 2837 | |
| Indian Village | city | Oregon | United States | 43.58 | -119.08 | 4189 | |
| Indiola | city | Oregon | United States | 44.08 | -123.79 | 200 | |
| Inglis | city | Oregon | United States | 46.13 | -123.17 | 200 | |
| Interlachen | city | Oregon | United States | 45.55 | -122.45 | 200 | |
| Ione | city | Oregon | United States | 45.50 | -119.82 | 1669 | |
| Ironside | city | Oregon | United States | 44.32 | -117.94 | 4189 | |
| Irrigon | city | Oregon | United States | 45.90 | -119.49 | 328 | |
| Irving | city | Oregon | United States | 44.11 | -123.17 | 374 | |
| Irvington | city | Oregon | United States | 45.54 | -122.65 | 200 | |
| Island City | city | Oregon | United States | 45.34 | -118.04 | 2719 | |
| Izee | city | Oregon | United States | 44.07 | -119.39 | 4199 |