The 2020 Tennessee State Senate election was held on November 3, 2020, to elect 16 of the 33 seats for the Tennessee's State Senate. The elections coincided with the Presidential, U.S. Senate, U.S. House, and State House elections. The primary elections were held on August 6, 2020, with the exception of presidential primaries held on March 3 of that year.
Republicans lost District 20, which includes suburban parts of Nashville in Davidson County.
One incumbent did not run for re-election in 2020. That incumbent was:
Two races were decided by a margin of under 10%:
Following Republican Doug Overbey's appointment as U.S. Attorney for the Eastern District of Tennessee in 2017, fellow Republican Art Swann was appointed to replace him.
The 6th Senate district covers a large portion of Knox County. It covers southern and western portions of Knoxville, Seymour, and Strawberry Plains. The district had been represented by Becky Duncan Massey.
The 10th senate district covers part of Bradley County and part of Hamilton County. The district had been represented by Todd Gardenhire.
Todd Gardenhire won re-election by 6.3%, defeating his Democratic opponent Glenn Scruggs.
In the concurrent 2020 presidential race, Donald Trump narrowly carried this district, winning by 3.4%.
There was a special election to succeed Jim Tracy In March 2018. Republican Shane Reeves defeated Democrat Gayle Jordan in the general election, with 71.7% of the vote.Reeves won re-election to a full term in 2020, receiving 71.8% of the vote.
The 18th senate district is based in Sumner and Trousdale Counties, and covers parts of eastern Davidson County. The district had been represented by Republican and Senate President Ferrell Haile.
The 20th senate district was based in Davidson County, and encompassed many of Nashville's wealthy inner suburbs, including Forest Hills, Belle Meade, and parts of Oak Hill and Goodlettsville. The district had been represented by Republican Steven Dickerson, who won re-election in 2016 by 12.5%. The district had been labeled competitive, and Dickerson was considered the most vulnerable incumbent heading into 2020, as the district had been trending leftwards.
Incumbent Republican Steven Dickerson narrowly lost re-election to Democratic nominee Heidi Campbell by 3.5%. This was the first time since 2006 that a Democrat was able to flip a Republican held seat.
In the concurrent 2020 presidential race, Democratic nominee Joe Biden comfortably carried this district, winning by 9.2%.
The 22nd senate district was based in Clarksville, where it covered Montgomery County, as well as Stewart and Houston Counties.
A special election was held on April 23, 2019 due to Senator Mark Green stepping down from his position because he was elected to the U.S. Congress, causing a vacancy. Bill Powers ran as a Republican against Democratic Juanita Charles as well as Independent party members Doyle Clark and David Cutting. Powers won that special election with 53.6% of the vote.
By county
There was a special election to succeed Mark Norris on March 12, 2019. Republican Paul Rose defeated Democrat Eric Coleman in the general election, with 84.0% of the vote.
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