List of highways numbered 1A

• Alberta Highway 1A
• British Columbia Highway 1A
• Manitoba Highway 1A
• Route 1A (Prince Edward Island)

• Bundesstraße 1a, a German road

• NH 1A

• New Zealand State Highway 1A

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

• National road 1A (Vietnam), a road connecting the northernmost and southernmost areas of the country

mk