16.2% live in New York
      10.1% live in Michigan
      9.1% live in Indiana and  Illinois
         
      If you don't like people
      called waterfall
      you should probably go to
      New Hampshire (None live there).
          
      Cool fact: South Dakota
      is the state with the most
      last name waterfall per capita.
      
      Check out the popularity
      of the last name waterfall
      for each state in the map below.