> The tiny area that makes up the City and County of San Francisco is relatively high density for its size,
Somewhat, but not to the extent you'd expect of an metropolitan core (which it arguably isn't, it's more just the cultural core of the Bay Area.) The City and County of San Francisco is the most dense county in California, but not the most dense city in the Bay Area, or even the densest area of similar size in the Bay Area. A similar sized slice of Santa Clara County including all of San Jose would still be higher density if the entire 50ish mi² outside of San Jose was completely depopulated. The urban core of Alameda County (the continuous strip consisting of the cities of Albany, Berkeley, Oakland, Emeryville, Alameda, Piedmont, San Leandro, San Lorenzo, and Hayward) has greater population and greater population density than San Francisco, too.
Somewhat, but not to the extent you'd expect of an metropolitan core (which it arguably isn't, it's more just the cultural core of the Bay Area.) The City and County of San Francisco is the most dense county in California, but not the most dense city in the Bay Area, or even the densest area of similar size in the Bay Area. A similar sized slice of Santa Clara County including all of San Jose would still be higher density if the entire 50ish mi² outside of San Jose was completely depopulated. The urban core of Alameda County (the continuous strip consisting of the cities of Albany, Berkeley, Oakland, Emeryville, Alameda, Piedmont, San Leandro, San Lorenzo, and Hayward) has greater population and greater population density than San Francisco, too.