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.)
People of European descent, or White Americans (also referred to as Caucasian Americans), constitute the majority of the 308 million people living in the United States, with 72.4% of the population in the 2010 United States Census.