This is a complete list of members of the United States House of Representatives during the 40th United States Congress listed by seniority.As an historical article, the districts and party affiliations listed reflect those during the 40th Congress (March 4, 1867 – March 3, 1869). Current seats and party affiliations on the List of current members of the United States House of Representatives by seniority will be different for certain members. Committee chairmanship in the House is often associated with seniority. However, party leadership is typically not associated with seniority.