The 98th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from January 3, 1983, to January 3, 1985, during the third and fourth years of Ronald Reagan's presidency. The apportionment of seats in the House of Representatives was based on the 1980 U.S. census.

The 97th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from January 3, 1981, to January 3, 1983, during the final weeks of Jimmy Carter's presidency and the first two years of Ronald Reagan's presidency. The apportionment of seats in the House of Representatives was based on the 1970 United States census.