A few years ago, I made this histogram for a friend (I'm not American myself), who was interested in the modal income for the US, instead of the median income. The modal income is when you pick a US citizen at random, the expected value for their income, which can be seen as the location of the peak in this histogram:
Note that the data is from 2008, and only counts employed citizens.
I compiled the data from an official US government data/demographics/census website (I forget which one, sorry). I noticed I could query the average income for all counties split over many "occupation groups". This gave me relatively fine-grained buckets (it doesn't really matter what they were, just that they were small-ish), weighted by the number of people in it, allowing me to plot the histogram. The really proper way to build this histogram would be to bucket an actual list of income for each individual US citizen. But that list is not available, for obvious reasons.
http://i.imgur.com/euPugla.png
Note that the data is from 2008, and only counts employed citizens.
I compiled the data from an official US government data/demographics/census website (I forget which one, sorry). I noticed I could query the average income for all counties split over many "occupation groups". This gave me relatively fine-grained buckets (it doesn't really matter what they were, just that they were small-ish), weighted by the number of people in it, allowing me to plot the histogram. The really proper way to build this histogram would be to bucket an actual list of income for each individual US citizen. But that list is not available, for obvious reasons.