2018 Tennessee Senate election

The 2018 Tennessee State Senate election was held on November 6, 2018, to elect 18 of the 33 seats for the Tennessee's State Senate. The elections coincided with the Governor, U.S. Senate, U.S. House, and State House elections. The primary elections were held on August 2, 2018.

Retirements
Three incumbents (2 Democrats and 1 Republican) did not run for re-election in 2018. Those incumbents are:

Democrats

 * 1) District 19: Thelma Harper retired.
 * 2) District 29: Lee Harris retired to run for mayor of Shelby County.

Republicans

 * 1) District 13: Bill Ketron retired to run for mayor of Rutherford County.

Democrats

 * 1) District 33: Reginald Tate lost renomination to Katrina Robinson.

Closest race
This race was decided by a margin of under 10%:

Detailed results by State Senate District
Sources: