U.S. Route 78 in Arkansas
| Route information | ||||
|---|---|---|---|---|
| Maintained by ArDOT | ||||
| Length | 140.75 mi (226.52 km) | |||
| Existed | 2023–present | |||
| Major junctions | ||||
| West end | I-57 / US 67 / AR 226 near Swifton | |||
| East end | I-55 / US 61 / US 64 / US 70 / US 78 / US 79 at the Tennessee state line | |||
| Location | ||||
| Country | United States | |||
| State | Arkansas | |||
| Counties | Craighead, Mississippi, Crittenden | |||
| Highway system | ||||
| 
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U.S. Highway 78 (US 78) is an east–west highway in northeast Arkansas. The road largely runs concurrently with Interstate 55 (I-55) within the state.