6. El Monte, California
This city has 113 000 inhabitants. Once was the city known for being the birthplace of many successful TV shows. Today, the city is more famous for being one of the least educated cities in the country. El Monte Union High School District features seven of the high schools in this city. Unfortunately, the statistics reflect that only 44.2% of the population has a high school diploma and only 7.1% with bachelor’s degree.

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Our top five of the dumbest cities in the US in 2018 are also the dumbest cities in California.