U.S. Route 30

U.S. Route 30 (US 30) is an east–west main route of the system of United States Numbered Highways, with the highway traveling across the northern tier of the country. It is the third longest U.S. route, after U.S. Route 20 and U.S. Route 6. The western end of the highway is at Astoria, Oregon; the eastern end is in Atlantic City, New Jersey. Despite long stretches of parallel and concurrent Interstate Highways, it has managed to avoid the decommissioning that has happened to other long haul routes such as U.S. Route 66.

Much of the historic Lincoln Highway, the first road across America (from New York City to San Francisco), became part of US 30; it is still known by that name in many areas.