The 1986 United States Senate election in Georgia was held on November 8, 1986. Incumbent Republican U.S. Senator Mack Mattingly ran for re-election, but was defeated by Democrat Wyche Fowler in a close race. This was also the last time a Democrat was elected to the class 3 Senate seat for a full term until 2022. This was the second of three consecutive elections for this Senate seat where the incumbent was defeated.