The 1898 United States general election occurred in the middle of Republican President William McKinley's first term, during the Fourth Party System. Members of the 56th United States Congress were chosen in this election. Republicans retained control of both houses of Congress.
Democrats picked up several seats in the House at the expense of Republicans and the Populists. However, Republicans continued to control the chamber with a slightly diminished majority.
In the Senate, Republicans picked up several seats at the expense of the Democrats, growing the Republican majority. Several Senators continued to affiliate with third parties.