High Quality Content by WIKIPEDIA articles! The Official Congressional Directory (also known as Congressional Directory) is the official directory of the United State Congress, prepared by the Joint Committee on Printing (JCP) and published by the United States Government Printing Office (GPO) since 1888. Per federal statute (44 USC 721) the Directory is published and distributed during the first session of each new Congress. It is a designated essential title distributed to Federal depository libraries and the current edition is available for purchase from GPO.