Stats from the Iowa DOT obtained by Des Moines Register show the most popular specialty plates that drivers in Iowa picked over 2025. University of Iowa (25,995)Iowa DOT Iowa DOT loading...2. Persons with disabilities plate and sticker (57,727)Iowa DOT Iowa DOT loading...1. Blackout design (713,550)Iowa DOT Iowa DOT loading... They have 23 general license plates, 30 collegiate license plates, 6 natural resources license plates, and 24 military license plates.