List of highways numbered 378
# List of highways numbered 378

The following highways are numbered 378:

## Canada

* Saskatchewan Highway 378

## Japan

* Japan National Route 378

## United States

* Interstate 378 (former)
* U.S. Route 378
* Georgia State Route 378
* Louisiana Highway 378
* Maryland Route 378 (unsigned)
* Nevada State Route 378 (former)
* New Mexico State Road 378
* New York State Route 378
* Ohio State Route 378
* Pennsylvania Route 378
* Puerto Rico Highway 378
* Virginia State Route 378

| Preceded by 377 | Lists of highways 378 | Succeeded by 379 |
| - | - | - |
