3. Baltimore, MD
The third place on our list of the cities with the highest autism rates in America goes to the largest city in Maryland has a rich history and an estimated population of 620,961 people. Maryland ranks 4th on the list of states where autism is most prevalent, and it is estimated that 1 out of 60 people are diagnosed as being autistic. Given these statistics, around 10,349 autistic people live in Baltimore.