It appears that this listing of all of Congress from Roll Call, starting with the richest and working on down, contains 192 millionaires based on net worth. Each profile comes with assets and liabilities; many also include notes as to the deficiencies of the financial reporting requirements governing Congress, leading most members to appear less privileged than they really are. Previous lists are also available. Another perspective, this one having even more Congressional millionaires (due to different number-crunching) is: Personal wealth: a nation of extremes, and a Congress, too from the Center for Responsive Politics.
Who Are The Wealthiest In Congress?