The Washington Post/Newsweek web only "On Faith" published a fact sheet on the religious affiliations of members of Congress. Currently the House and Senate each have one member designated as "Unitarian." Presumably UU. They are Sen. Kent Conrad (D-ND) and Rep. Pete Stark (D-CA). With .04% of total members of Congress we exceed slightly our reported .03% of the general population.
In numbers we equal Buddists, as well as AMEs, Disciples of Christ and a number of other Christian denominations. We exceed Quakers and Muslims (one each) and Hindus of whom there are currently none.
A little something for this election season.
h/t Street Prophets.