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US Largest 14-Letter Cities
DirectionsFirst choose the number of cities by typing ’50’, ‘100’, or ‘all’ – then try to achieve the highest population among US 14-letter cities you chose. ‘St’ is abbreviated for naming purposes.
Quiz Takers 
Somehow Butte, MT was included in the map
Butte-Silver Bow is the official name, which has 14 letters.
this should do it for the US cities by # of letters map quizzes – looking for 15+ letters – there is already a “US Cities With Long Names” quiz.