"This report presents a profile of the membership of the 115th Congress (2017-2018) as of November 13, 2017. Statistical information is included on selected characteristics of Members, including data on party affiliation, average age, occupation, education, length of congressional service, religious affiliation, gender, ethnicity, foreign births, and military service.
In the House of Representatives, there are 242 Republicans (including 1 Delegate and the
Resident Commissioner of Puerto Rico), 198 Democrats (including 4 Delegates), and 1 vacant
seat. The Senate has 52 Republicans, 46 Democrats, and 2 Independents, who both caucus with
The average age of Members of the House at the beginning of the 115th Congress was 57.8 years;
of Senators, 61.8 years, among the oldest in U.S. history. The overwhelming majority of
Members of Congress have a college education. The dominant professions of Members are public
service/politics, business, and law. Most Members identify as Christians, and Protestants
collectively constitute the majority religious affiliation. Roman Catholics account for the largest
single religious denomination, and numerous other affiliations are represented, including Jewish,
Mormon, Buddhist, Muslim, Hindu, Greek Orthodox, Pentecostal Christian, Unitarian
Universalist, and Christian Science..."