The highest IQ was 228, according to Guinness Book of Records, this score belongs to the âsmartest' person in the world Marilyn vos Savant who scored it when she was 10 year old. This would, according to recent research, correspond to about IQ 185 at adult age.
The rest of the states on the list each have a white population of more than 90%. As for states with the smallest percentage of whites, Hawaii, Mississippi, Louisiana, Maryland, and Georgia comprise the top five. Here are the 10 states with the highest percentage of whites: Maine; Vermont; New Hampshire; West Virginia; Iowa; Wyoming; Idaho; Montana; Kentucky; North Dakota (Click for a list of 50 bizarre state laws.)
Here are the top ethnic group in the United States. Since many Asian and Hispanic groups are classified differently, most of the groups listed are white. The most common is German-American. At least 42.8 million Americans say they are this. Many people came to the U.S. from Germany in the 19th and early 20th century. German American is the most common ethnic group in over half the states. The most number of Germans are found in the Midwest, West, and Pennsylvania.