The following highways are numbered 20A:
New Zealand
editUnited States
edit- U.S. Route 20A (New York)
- County Road 20A (Putnam County, Florida)
- Massachusetts Route 20A
- Nebraska Highway 20A (former)
- New York State Route 20A (1930–1932) (former)
- New York State Route 20A (1938–1939) (former)