List of highways numbered 18A

The following highways are numbered 18A:

Canada

• File:PEI Highway 18A.svg Prince Edward Island Route 18A

United States

• File:Union County 18A.svg County Road 18A (Union County, Florida)
• File:N SPUR 18A.svg Nebraska Spur 18A
• File:Nevada 18A.svg Nevada State Route 18A (former)
• File:NY-18A (1960).svg New York State Route 18A (former)
  • File:Otsego County Route 18A NY.svg County Route 18A (Otsego County, New York)
  • File:Washington County Route 18A NY.svg County Route 18A (Washington County, New York)
• File:Oklahoma State Highway 18A.svg Oklahoma State Highway 18A