21st, although it's not a like-and-like comparison: https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population_density https://en.wikipedia.org/w

21st, although it's not a like-and-like comparison: https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population_density https://en.wikipedia.org/wiki/List_of_United_States_cities_b...