Do you need to be rich to get elected to Congress? Or does getting elected to Congress make you rich? Whatever the cause and effect, Congress is now officially the land of millionaires.



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According to the Center for Responsive Politics, a majority—268 of the 534 members of Congress—had an average net worth in 2012 of $1 million or more, marking the first time millionaires held a majority in Congress. The previous year, only 257 members had millionaire status.

The median net worth for the lawmakers who were in Congress as of the May 2013 filing was $1,008,767, up from the previous year's $966,000.

(Read more: Millionaires placing their bets on Europe) Of course Congress—and especially the Senate—has long been a wealthy club. But millionaires have always been in the minority. The Center for Responsive Politics said that this is a "watershed" moment and shows how removed Congress has become from the concerns of most, nonmillionaire Americans.