Quote:
Originally Posted by rivernorthlurker
Cursory google search shows Steely's estimates more or less accurate. SF, Seattle, LA, Boston with some single zip codes up in the 50-60 ppsm and then the other top 80 being NYC/NJ area. DC/Houston/Chicago topping out around 34 ppsm.
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keep in mind that those singular very high density zip codes in boston and seattle are very small.
the boston one only has 6,000 people. and the seattle one is a freaking fly speck - 180 people living on a single city block (that's NOT a zip code, that's statistical hiccup).
by comparison, all of chicago's zip codes on that list are real zip codes with 50K - 100K people.
any zip code under 20K people should probably discounted from this exercise (ie. too small to really count).
Quote:
Originally Posted by rivernorthlurker
The data is probably a bit dated because the map shows the old district for 60610 which was split into 60610 and 60654 I believe which I think are both probably 30+ ppm now.
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yeah, that data seems really old. it says there are only 10 chicago zip codes over 20K ppsm.
i found a map based sourced that used 2019 ACS that says there are18 such zip codes in the city (i had to hand count them).
census 2020 data might even nudge a couple more right on the bubble over the threshold.
but the broader point absolutely stands. any (regular size) zip code in the US over 20K ppsm, outside of NYC, is in the top 0.2% of zip codes for density in the nation.
to say that
"27,000 ppsm isn't really urban" is using an impossibly high standard of urban density for everywhere in the US not named new york.