The 1988 United States Senate election in Wyoming was held on November 8, 1988. Incumbent Republican Senator Malcolm Wallop ran for re-election to a third term. He was opposed by Democratic State Senator John Vinich in the general election. Despite Wallop's past strong performances in 1976 and 1982, and the overwhelming Republican majority in Wyoming in the presidential election, Wallop faced a surprisingly competitive race. He ended up defeating Vinich by less than 1%, by a margin of just 1,322 votes. To date, this remains the strongest performance by a Democratic U.S. Senate nominee in Wyoming since 1970, the last time a Democrat won a Senate election in the state. This is also the closest U.S. Senate race in Wyoming history.
