List of highways numbered 18B

The following highways are numbered 18B:

United States

 * Otsego County Route 18B NY.svg County Route 18B (Otsego County, New York)
 * N SPUR 18B.svg Nebraska Spur 18B
 * NY-18B (1960).svg New York State Route 18B (former)
 * Oklahoma State Highway 18B.svg Oklahoma State Highway 18B