2020 Kansas Senate election

The 2020 Kansas Senate election took place as part of the biennial 2020 United States elections. Kansas voters elected state senators in all of the state's 40 senate districts. Senators serve four-year terms.

Retirements
Four incumbents did not run for reelection in 2020. Those incumbents are:

Republicans

 * 1) District 8: Jim Denning: Retiring
 * 2) District 30: Susan Wagle: Retiring

Democrats

 * 1) District 7: Barbara Bollier: Retiring; ran for United States Senate
 * 2) District 18: Vic Miller: Retiring

Republicans
Seven Republicans lost renomination.


 * 1) District 11: John Skubal lost renomination to Kellie Warren.
 * 2) District 14: Bruce Givens lost renomination to Michael Fagg.
 * 3) District 15: Dan Goddard lost renomination to Virgil Peck Jr.
 * 4) District 20: Eric Rucker lost renomination to Brenda Dietrich.
 * 5) District 24: Randall Hardy lost renomination to J. R. Claeys.
 * 6) District 33: Mary Jo Taylor lost renomination to Alicia Straub.
 * 7) District 34: Ed Berger lost renomination to Mark Steffen.

Republican

 * 1) District 5: Kevin Braun lost to Jeff Pittman.

Democratic

 * 1) District 19: Anthony Hensley lost to Rick Kloos.

Close races
Districts where the margin of victory was under 10%:
 * 1)  District 22, 1.2% 
 * 2)  District 3, 2.04% 
 * 3)  District 19, 2.42% (flip)
 * 4)  District 10, 3.72% 
 * 5)  District 30, 4.22% 
 * 6)  District 9, 4.52% 
 * 7)  District 11, 5.36% 
 * 8)  District 5, 6.04% (flip)
 * 9)  District 23, 6.22% 
 * 10)  District 28, 8.1% 
 * 11)  District 8, 8.72% (flip)
 * 12)  District 25, 9.18% 
 * 13)  District 21, 9.58%