List of highways numbered 40A

The following highways are numbered 40A:

United States

 * Levy County Road 40A FL.svg County Road 40A (Levy County, Florida)
 * Monmouth County Route 40A NJ.svg County Route 40A (Monmouth County, New Jersey)
 * NY-40A (1927).svg New York State Route 40A (former)
 * Dutchess County Route 40A NY.svg County Route 40A (Dutchess County, New York)
 * CR 40A jct.svg County Route 40A (Steuben County, New York)
 * Suffolk County Route 40A NY.svg County Route 40A (Suffolk County, New York)
 * Oklahoma State Highway 40A.svg Oklahoma State Highway 40A
 * SD 40A.svg South Dakota Highway 40A (former)