Today’s story on the D.C. area’s richest communities outlines the top 20 wealthiest communities in our area, based on median household income data from the Census’ 2005-2009 American Community Survey.

But in putting together that list we also found out which communities have some of the lowest-ranking household income totals. Please note the list does not include every community because the survey doesn’t have information on some areas — but we did our best.