Congress has a lot of wealthy people.
As OpenSecrets.org puts it, "Of 534 current members of Congress, at least 268 had an average net worth of $1 million or more in 2012, according to disclosures filed last year by all members of Congress and candidates. The median net worth for the 530 current lawmakers who were in Congress as of the May filing deadline was $1,008,767 -- an increase from last year when it was $966,000. In addition, at least one of the members elected since then, Rep. Katherine Clark(D-Mass.), is a millionaire, according to forms she filed as a candidate. (There is currently one vacancy in Congress.)"
The data was collected by the Center For Responsive Politics.
Here, according to that data, are Congress' richest members.
These are the top assets owned by members
These are the most invested-in sectors by Congress members
To check out all the data follow this link