WASHINGTON — It is hardly the kind of news that lawmakers in Congress would want to highlight during a week when unemployment benefits expired for more than a million Americans. But Congress has achieved something of a milestone.

For the first time in history, more than half the members of the House and Senate are now millionaires, according to a new analysis of financial disclosure reports filed last year.

The median net worth for lawmakers in the House and Senate was $1,008,767 — up 4.4 percent, according to the analysis, conducted by the nonprofit Center for Responsive Politics, which examines the influence of money on politics in Washington.

Over all, at least 268 of the 534 current members of Congress had an average net worth of $1 million or more in 2012, which is the year covered by the reports that each lawmaker had to file in 2013.