23. Grand Prairie, Texas
Once known for being one of the best cities in Texas, Grand Prairie holds a population of 185, 631 people. Public and private high schools are located in the city, and there are 33 colleges or universities within 40 miles around Grand Prairie. This city is on our list of dumbest cities in the US in 2018 for having 79.40% of high school graduates and a percentage of people with a graduate or professional degree of only 6.5%.
PIxabay/ Public Domain
