List of highways numbered 3A
The following roads are numbered 3A:
Canada
- Alberta Highway 3A
- British Columbia Highway 3A
- Manitoba Highway 3A
- Newfoundland and Labrador Route 3A
- Nova Scotia Trunk 3A
United States
- Massachusetts Route 3A
- Nevada State Route 3A
- New Hampshire Route 3A
- New York State Route 3A
- Oklahoma State Highway 3A
- Texas Park Road 3A