U.S. Route 1A (US 1A) is the name of several highways found in the United States.
North Carolina
Wake Forest–Youngsville
U.S. Highway 1A (US 1A) is a alternate route of US 1 through the towns of Wake Forest and Youngsville. While serving the downtown areas of both towns, the highway bypasses the primary commercial district of each. US 1A runs concurrently with North Carolina Highway 98 Business (NC 98 Bus.) along South Avenue in Wake Forest and NC 96 in Youngsville. US 1A was established in 1953 when US 1 was rerouted to bypass west of Wake Forest and Youngsville. The former alignment of US 1 became US 1A.
Franklinton
U.S. Highway 1A (US 1A) was established in 1953 when US 1 was rerouted to bypass west Franklinton. A two-lane urban highway, it follows the old alignment through the downtown area, via Main Street. In November 2023, the American Association of State Highway and Transportation Officials approved a North Carolina Department of Transportation request to decommission the route.
Connecticut
U.S. Route 1A (US 1A) in Connecticut is a short loop route within the town of Stonington that passes through Stonington. US 1 originally went along this route until 1941. US 1A is the only surviving alternate U.S. Route in Connecticut.
The route is long and takes the following route: from US 1 to North Water Street, to Trumbull Avenue, to Alpha Avenue, then to Elm Street, and back to US 1.
;Major intersections
U.S. Highway 1A (US 1A) was established around 1957, replacing the old mainline US 1 through Gill and downtown Henderson, North Carolina, via Raleigh Road and Garnett Street. It was renumbered in 1960 as US 1 Bus.