Just to follow up, from this document: http://www.taxfoundation.org/files/sr151.pdf http://www.taxfoundation.org/files/sr151.pdf in Table 1 on Page 3 Lower Cla

Just to follow up, from this document: http://www.taxfoundation.org/files/sr151.pdf http://www.taxfoundation.org/files/sr151.pdf in Table 1 on Page 3 Lower Class = Under $23,700/yr Middle Class = $23,700 to $99,502/yr Upper Class = Above $99,502/yr This is a national average in America. Obviously places like the bay area and the Mississippi delta are going to vary a lot. For another look at it, check out this: http://en.wikipedia.org/wiki/Household_income_in_the_United_States#Quintiles http://en.wikipedia.org/wiki/Household_income_in_the_United_... (Note that my guess at rich being the top 5% means $157,176/yr and up according to that wiki article.)