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. Fifty-one of the 153 African Americans who have served in Congress are current Members—48 in the House and three in the Senate. In total, there have been 144 black Members of the House of Representatives and ten Senators. One has served in both chambers.