The religious composition of the 119th Congress Members of the incoming 119th Congress will be sworn in at the U.S. Capitol on Jan. 3, 2025. (Cynthia Johnson/Getty Images) Every two years, Pew Research Center publishes a report on the religious affiliation of members of the incoming Congress. This report is the ninth in the series, which started with the 111th Congress that began in 2009. Data on members of Congress comes from CQ Roll Call, which surveys members about their demographic characteristics, including religious affiliation. Pew Research Center researchers then code the data so that Congress can be compared with U.S. adults overall. For example, members of Congress who tell CQ Roll Call they are “Southern Baptists” are coded as “Baptists” – a broader category (including Southern Baptists as well as other Baptists) used for analysis of the general public. Data in this report covers voting members of Congress scheduled to be sworn in on Jan. 3, 2025. While there are 535 voting seats in Congress (100 in the Senate and 435 in the House of Representatives), this analysis excludes three of those seats: Florida’s 1st District seat, due to the resignation of Matt Gaetz; Florida’s 6th District seat, due to the announced resignation of Michael Waltz; and the Ohio Senate seat held by JD Vance, who is set to become vice president on Jan. 20, 2025. This analysis, then, looks at 532 members of Congress rather than 535. Data for all U.S. adults comes from Pew Research Center’s 2023 National Public Opinion Reference Survey (NPORS), conducted May 19-Sept. 5, 2023. Figures for Protestant subgroups, Messianic Jews, Unitarians and Humanists come from the Center’s American Trends Panel (ATP) survey conducted Aug. 7-27, 2023. Jewish estimates come from the Center’s survey of Jewish Americans, conducted Nov. 19, 2019-June 3, 2020. Read more about how Pew Research Center measures the religious composition of the United States. When the U.S. Congress convenes for its 119th session on Jan. 3, it will have marginally fewer Christians than it did in the previous session (2023-25), continuing a gradual, 10-year decline. Christians will make up 87% of voting members in the Senate and House of Representatives, combined, in the 2025-27 congressional session. That’s down from 88% in the last session and 92% a decade ago. Overall, there will be 461 Christian members of Congress when the 119th Congress meets, compared with 469 in the previous Congress and 491 during the 2015-17 session. It will be the lowest number of Christians since the start of the 2009-2011 congressional session, the first for which Pew Research Center conducted this analysis. (This analysis does not include three vacant – or soon to be vacant – seats whose eventual occupants are unknown, including the Ohio Senate seat of Vice President-elect JD Vance.) And yet, at 87%, Christians still make up the lion’s share of the Congress, far exceeding the Christian share of all U.S. adults, which stands at 62% after several decades of decline. In 2007, 78% of American adults were Christian, according to Pew Research Center’s Religious Landscape Study from that year, and in the early 1960s more than nine-in-ten U.S. adults were Christian, according to historical Gallup polling. The new Congress is also more religious than the general population by another, related measure: Nearly three-in-ten Americans (28%) are religiously unaffiliated, meaning they are atheist or agnostic or say their religion is “nothing in particular.” But less than 1% of Congress falls into this category, with three religiously unaffiliated members: incoming Reps. Yassamin Ansari of Arizona and Emily Randall of Washington, both of whom are Democrats, and incoming Rep. Abraham Hamadeh of Arizona, a Republican. While the share of the U.S. public that is religiously unaffiliated – sometimes called “nones” – has risen rapidly in recent decades (from 16% in 2007 to 28% in our recent polling), the corresponding share of Congress has remained miniscule. Prior to the 119th session, the only member of Congress who was categorized as religiously unaffiliated in our analyses was Kyrsten Sinema, independent of Arizona, who served from 2013 through the Congress that is just ending. (She did not run for reelection in 2024.) Pew Research Center’s analysis is based on data from CQ Roll Call, a publisher in Washington, D.C., that has closely covered Congress for decades. Breakdown by denomination Of the 461 Christians in the 119th Congress, 295 are Protestant, a decrease of eight from the previous session. Partial historical data suggests that Protestants had a much larger presence in Congress a few decades ago, including 398 members in 1961. But there have been fewer than 300 Protestants in six of the last nine sessions over the last decade and a half. That said, Protestants continue to make up a disproportionately high share of the 119th Congress (55% of members) when compared with the U.S. adult population (40%). Baptists are the largest category of Protestants in the new Congress, with 75 members (14.1% of Congress). That’s eight more Baptists than in the prior session. The next largest Protestant groups in the new Congress are Methodists (26 members), Presbyterians (26), Episcopalians (22) and Lutherans (19). These four groups have had shrinking U.S. memberships in recent decades and now have a considerably smaller presence in Congress than they used to. For example, in the 112th Congress of 2011-13, there were 51 Methodists, 45 Presbyterians, 41 Episcopalians and 26 Lutherans. Of the 295 Protestants in Congress, 101 do not specify a particular denomination or denominational family, instead giving broad or vague answers such as “Protestant,” “Christian” or “evangelical Protestant.” This is six fewer who identify in those ways than in the last Congress, but the overall trend during the last decade has been for increasing numbers of U.S. representatives and senators to give these kinds of answers. By comparison, only 58 members said they were “just Christians” or gave nonspecific, Protestant descriptions of their religious affiliation at the start of the 114th Congress in 2015. The new Congress also has 150 Catholics, two more than in