The 1970 United States Senate election in Tennessee was held on November 3, 1970. Republican Bill Brock defeated Democratic incumbent Albert Gore, Sr. who ran for a fourth term. With Brock's victory, Republicans held both of Tennessee's U.S. Senate seats, marking the first time Republicans held both Senate seats in a former Confederate State since Reconstruction. He was also the first Republican to hold this seat since 1875.
9.8% of the voting age population participated in the Republican primary.
21.9% of the voting age population participated in the Democratic primary.