The 1998 United States House of Representatives elections in Idaho were held on November 3, 1998, to elect the state of Idaho's two members to the United States House of Representatives.
Incumbent Republican Congresswoman Helen Chenoweth ran for re-election to a third term. She defeated farmer Jim Pratt in the Republican primary by a wide margin, winning 71 percent of the vote. In the general election, she faced Democratic nominee Dan Williams, in a rematch of their 1996race. While Chenoweth only narrowly defeated Williams in 1996, she won by a wider margin the second time, receiving 55 percent of the vote to Williams's 45 percent.
Republican Congressman Mike Crapo opted to run for the United States Senate rather than seek re-election. Mike Simpson, the Speaker of the Idaho House of Representatives, narrowly won the Republican primary to succeed Crapo, winning 40 percent of the vote to State Representative Mark Stubbs's 35 percent. In the general election, he was challenged by former Congressman Richard H. Stallings, the Democratic nominee.