The 2020 Missouri Senate elections were held on November 3, 2020, to elect the 17 Missouri State Senators to the Missouri Senate. Half of the Senate's thirty-four seats are up for election every two years, with each Senator serving four-year terms. The last time that these seats were up for election was the 2016 Missouri Senate election, and the next time that these seats will be up for election will be the 2024 Missouri State Senate election.

Predictions SourceRankingAs of The Cook Political ReportOctober 21, 2020

Results summary Statewide Party Candi-dates Votes Seats No. % No. +/– % Republican Party 14 731,386 53.38% 10 58.82% Democratic Party 13 598,526 43.68% 7 41.18% Libertarian Party 2 24,717 1.80% 0 0.00% Green Party 1 15,383 1.12% 0 0.00% Write-Ins 3 90 0.00% 0 0.00%Total 29 1,370,102 100.00% 17 100.00%

District Results of the 2020 Missouri State Senate elections by district:

DistrictRepublicanDemocraticOthersTotalResult Votes % Votes % Votes % Votes % District 1 43,495 44.57% 54,095 55.43% - - 97,590 100.00% Democratic hold District 3 65,686 100.00% - - - - 65,686 100.00% Republican hold District 5 8,349 12.90% 56,379 87.10% - - 64,728 100.00% Democratic hold District 7 - - 70,586 82.09% 15,401 17.91% 85,987 100.00% Democratic hold District 9 11,026 17.64% 51,463 82.36% - - 62,489 100.00% Democratic hold District 11 - - 50,065 100.00% - - 50,065 100.00% Democratic hold District 13 - - 64,191 87.56% 9,122 12.44% 73,313 100.00% Democratic hold District 15 61,172 53.99% 52,132 46.01% - - 113,304 100.00% Republican hold District 17 45,141 46.62% 51,690 53.38% - - 96,831 100.00% Democratic hold District 19 50,570 51.60% 47,367 48.33% 72 0.07% 98,009 100.00% Republican hold District 21 61,698 79.82% - - 15,595 20.17% 77,293 100.00% Republican hold District 23 57,988 57.25% 43,306 42.75% - - 101,294 100.00% Republican hold District 25 58,215 100.00% - - - - 58,215 100.00% Republican hold District 27 63,644 76.88% 19,135 23.12% - - 82,779 100.00% Republican hold District 29 75,582 100.00% - - - - 75,582 100.00% Republican hold District 31 63,929 71.42% 25,584 28.58% - - 89,513 100.00% Republican hold District 33 64,891 83.81% 12,533 16.19% - - 77,424 100.00% Republican holdTotal 731,386 53.38% 598,526 43.68% 40,190 2.93% 1,370,102 100.00%

Close races Districts where the margin of victory was under 10%: District 15, 7.98% District 17, 6.74% District 19, 3.27%

District 1 Democratic primary Primary results

Republican primary Primary results

General election Polling Poll source Date(s)administered Samplesize Marginof error DougBeck (D) DavidLenihan (R) UndecidedRemington Research Group (R)September 9–10, 2020646 (LV)± 3.8%43%36%21%

Results

District 3 Republican primary Polling Poll source Date(s)administered Samplesize Marginof error JoshuaBarrett ElaineGannon KentScism UndecidedRemington Research Group (R)June 24–25, 2020500 (LV)± 4.3%24%23%19%34%

Primary results

General election Results

District 5 Democratic primary Polling Poll source Date(s)administered Samplesize Marginof error JeremiahChurch McFarlaneDuncan MeganGreen WilliamHaas SteveRoberts MichelleSherod UndecidedRemington Research Group (R)April 1–5, 2020486 (LV)± 4.6%7%1%16%14%18%9%35%Remington Research Group (R)December 4–5, 2019464 (LV)± 4.6%–3%24%–24%4%45%Remington Research Group (R)August 21–22, 2019501 (LV)± 4.5%––––24%21%55%––32%–23%11%34%

Poll source Date(s)administered Samplesize Marginof error PeterMeredith SteveRoberts MichelleSherod UndecidedRemington Research Group (R)August 21–22, 2019501 (LV)± 4.5%20%24%13%43%

Primary results

Republican primary Primary results

General election Results

District 7 Democratic primary Primary results

Green primary Primary results

General election Results

District 9 Democratic primary Primary results

Republican primary Primary results

General election Results

District 11 Democratic primary Primary results

General election Results

District 13 Democratic primary Polling Poll source Date(s)administered Samplesize Marginof error AlanGreen AngelaMosley TommiePierson Jr UndecidedRemington Research Group (R)June 3–4, 2020545 (LV)± 4.2%15%21%19%45%

Primary results

Libertarian primary Primary results

General election Results

District 15 Democratic primary Primary results

Republican primary Primary results

General election Polling Poll source Date(s)administered Samplesize Marginof error AndrewKoenig (R) DebLavender (D) UndecidedRemington Research Group (R)October 7–8, 2020644 (LV)± 3.8%45%49%6%Remington Research Group (R)August 9–20, 2020585 (LV)± 4.0%43%43%14%Missouri ScoutMay 29–30, 2019648 (LV)± 3.8%50%35%15%

Poll source Date(s)administered Samplesize Marginof error AndrewKoenig (R) MarkOsmack (D) UndecidedMissouri ScoutMay 29–30, 2019648 (LV)± 3.8%52%33%15%

Results

District 17 Democratic primary Primary results

Republican primary Primary results

General election Results

District 19 Democratic primary Primary results

Republican primary Primary results

General election Polling Poll source Date(s)administered Samplesize Marginof error CalebRowden (R) JudyBaker (D) UndecidedRemington Research Group (R)October 20–22, 2020489 (LV)± 4.4%48%48%4%Remington Research Group (R)August 26–27, 2020536 (LV)± 4.2%47%42%11%Remington Research Group (R)September 25–27, 2019446 (LV)± 4.7%49%45%6%

Poll source Date(s)administered Samplesize Marginof error CalebRowden (R) JudyBaker (D) UndecidedRemington Research Group (R)September 25–27, 2019446 (LV)± 4.7%50%44%6%

Results

District 21 Republican primary Primary results

Libertarian primary Primary results

General election Results

District 23 Democratic primary Primary results

Republican primary Polling Poll source Date(s)administered Samplesize Marginof error BillEigel DanO'Connell EricWulff UndecidedRemington Research Group (R)June 17–19, 2020443 (LV)± 4.8%33%8%7%52%

Primary results

General election Results

District 25 Republican primary Polling Poll source Date(s)administered Samplesize Marginof error JasonBean StephenCookson EddyJustice JeffShawan UndecidedRemington Research Group (R)July 8–9, 2020436 (LV)± 4.8%26%11%23%17%23%Remington Research Group (R)July 30–31, 2019438 (LV)± 4.7%––17%16%67%

Primary results

General election Results

District 27 Democratic primary Primary results

Republican primary Polling Poll source Date(s)administered Samplesize Marginof error HollyRehder KathySwan UndecidedRemington Research Group (R)July 15–16, 2020414 (LV)± 4.9%51%29%20%Remington Research Group (R)August 7–8, 2019520 (LV)± 4.3%26%27%48%

Primary results

General election Results

District 29 Republican primary Polling Poll source Date(s)administered Samplesize Marginof error DavidCole MikeMoon UndecidedRemington Research Group (R)July 25–26, 2020504 (LV)± 4.5%34%37%29%Remington Research Group (R)April 21–23, 2020536 (LV)± 4.2%15%25%60%Remington Research Group (R)July 17–18, 2019532 (LV)± 4.3%14%21%65%

Primary results

General election Results

District 31 Democratic primary Primary results

Republican primary Polling Poll source Date(s)administered Samplesize Marginof error JackBondon RickBrattin BillYarberry UndecidedRemington Research Group (R)July 21–23, 2020403 (LV)± 4.9%40%34%6%20%Remington Research Group (R)April 15–16, 2020419 (LV)± 4.76%16%18%5%60%

Primary results

General election Results

District 33 Democratic primary Primary results

Republican primary Polling Poll source Date(s)administered Samplesize Marginof error KarlaEslinger VanKelly RobertRoss UndecidedRemington Research Group (R)July 27–29, 2020503 (LV)± 4.5%20%17%39%24%Remington Research Group (R)May 6–7, 2020568 (LV)± 4.0%15%12%16%57%Remington Research Group (R)July 24–25, 2019510 (LV)± 4.5%–16%15%69%

Primary results

General election Results

Notes

Partisan clients

References