It looks like Texas did change it: https://secure.wikimedia.org/wikipedia/en/wiki/Vehicle_registration_plates_of_the_United_States#Front/rear_mounting https://s

It looks like Texas did change it: https://secure.wikimedia.org/wikipedia/en/wiki/Vehicle_registration_plates_of_the_United_States#Front/rear_mounting https://secure.wikimedia.org/wikipedia/en/wiki/Vehicle_regis... The only two states I've lived in (FL and PA) don't require front plates, so I was probably overestimating the popularity of only rear plates.