Route 28A, or Highway 28A, may refer to:
Canada Alberta Highway 28A
India National Highway 28A (India)
United States Massachusetts Route 28A M-28A (Michigan highway) (former) New Hampshire Route 28A County Route 28A (Monmouth County, New Jersey) New York State Route 28A County Route 28A (Columbia County, New York) County Route 28A (St. Lawrence County, New York) Oklahoma State Highway 28A