The following roads are numbered 3A:
Canada Alberta Highway 3A British Columbia Highway 3A Manitoba Highway 3A Newfoundland and Labrador Route 3A (Team Gushue Highway) Nova Scotia Trunk 3A (former)
United States Massachusetts Route 3A Nevada State Route 3A (former) New Hampshire Route 3A County Route 3A (Monmouth County, New Jersey) (former) New York State Route 3A Oklahoma State Highway 3A Texas Park Road 3A
Territories Guam Highway 3A