Second densest large city. But if you do it by municipality, SF is the 21st most dense in the country. Four of NYC's five boroughs (coextensive with counties, t

Second densest large city. But if you do it by municipality, SF is the 21st most dense in the country. Four of NYC's five boroughs (coextensive with counties, the way SF is coextensive with SF county) are individually denser than SF.