This morning, I got a kick out of looking at the origins of the license plates I came across while walking to school. To my surprise, there were quite a few, which is why I share the list with you (in alphabetical order, not by preference ;) ):
California, Colorado, Connecticut, Florida, Illinois, Maryland, Massachusetts, New Jersey, New York, Ohio, Pennsylvania, South Carolina, Texas, Virginia
And two that don't come from a US state:
Ontario (Canada) and a US federal license plate ("For government use only")
That's a total of 16 different origins. Not bad for a single walk!
Also, if you'd like to see the history of how license plates looked in your state then and now, I found the website 15q.net that has a pretty comprehensive picture collection that's worth checking out.