List of highways numbered 40A
The following highways are numbered 40A:
United States
- County Road 40A (Levy County, Florida)
- County Route 40A (Monmouth County, New Jersey)
- New York State Route 40A(former)
- County Route 40A (Dutchess County, New York)
- County Route 40A (Steuben County, New York)
- County Route 40A (Suffolk County, New York)
- Oklahoma State Highway 40A
- South Dakota Highway 40A(former)