population

Interactive Census Data

Great interactive chart from the NY Times that uses Google maps and data from the census.
You can look at incomes from the census track level (e.g. a few blocks) all the way up to the entire country. This diagram shows income distribution:
Income in Manhattan
And this one is the change in median income:
Income change
You can also check things like ethnicity and various income levels.

Population of the Five Boroughs

I saw a graph showing the population of the Five Boroughs: Manhattan, Bronx, Staten Island, Brooklyn, and Queens. I tracked the data to: NYC Population and NYC 2008 Population.
What I was surprised about is how the population of Manhattan has actually dropped over the years:
grab-001.png
Of course, it’s density that matters! Here’s the population expressed as 1000 people per square mile
grab-002.png
Wow! 72,000 people per square mile in Manhattan.