Following are nine lists of historical data, compiled for the publication of Black Americans in Congress, 1870–2007. These lists were developed to answer reference questions often posed by Member offices, researchers, and the general public. Forty-eight of the 146 African Americans who have served in Congress are current Members—46 in the House and two in the Senate. In total, there have been 138 black Members of the House of Representatives and nine Senators. One has served in both chambers.