These two charts of average incomes of U.S. households by quintile (bottom 20%, middle 60% (20%+20%+20%) and top 20%) have both good news and bad news. (Charts are from the non-partisan Congressional Budget Office -- CBO).

These charts depict 1) household income before transfers (means-tested government benefits) and taxes, in other words, pre-tax earned income, income from capital gains and interest, unemployment insurance, etc., and 2) income after federal transfers and taxes.

This is a much more accurate view of household income, as this is what gets deposited in households' accounts.

The typical chart of average incomes doesn't include government transfers, so it under-reports the actual income of households receiving means-tested government benefits. (Note that the CBO methodology may not include all government transfers, as not all transfers are means-tested, i.e. based on income and other qualifying factors.)