List of highways numbered 1A

Canada

• Alberta Highway 1A
• British Columbia Highway 1A
• Manitoba Highway 1A
• Prince Edward Island [Route 1A]

Germany

• Bundesstraße 1a, a German road

Greece

• Greek [National Road 1a|EO1a road], remnants of the realigned Athens–Thessaloniki–Evzonoi road that were not upgraded to the A1 motorway

Laos

• Route 1A

New Zealand

• New Zealand State Highway 1A

Switerland

• A1a motorway (Switzerland)

United States

• U.S. Route 1A
• Delaware Route 1A
• Massachusetts Route 1A
• New Hampshire Route 1A
• New York State Route 1A
• Rhode Island Route 1A
• Secondary State Highway 1A (Washington)

Vietnam

• National [Route 1 (Vietnam)], also known as National Route 1, a road connecting the northernmost and southernmost areas of the country