A new report from the Center for Responsive Politics provides the average net worth of the members of Congress in 2013. The data were just begging to be made into a heat map, so here it is. Medians are provided at the bottom of the graphic.

Data source: http://www.opensecrets.org/news/2014/01/millionaires-club-for-first-time-most-lawmakers-are-worth-1-million-plus.html