How many used cars are on the road?

According to the U.S. Department of Transportation, there were nearly 280 million light-duty vehicles (cars, light trucks, and minivans) registered in the United States in 2020. Of these, approximately 78 million were used vehicles, meaning they were at least a year old. This means that used cars make up roughly 28% of all light-duty vehicles on the road in the United States.