Interstate 66 (Kansas–Kentucky)
| Proposed I-66 corridor highlighted in red | |
| Route information | |
| Existed | 1991–2015 (never built) | 
| Location | |
| Country | United States | 
| Highway system | |
Interstate 66 (I-66) is a canceled Interstate Highway designated in the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 as the East–West TransAmerica Corridor and High Priority Corridor 3.