States yet to elect and re-elect a female to the US Senate.

AL- 2022(Martha Roby-R) when Shelby-R retires. 2020- if Heather Whitestone-R runs and wins the GOP nomination.
CO- 2020(Kerry Donovan-D)
CT- 2022(Jahana Hayes-D) if or when Blumenthal-D retires.
DE- 2024(Lisa Blunt Rochester-D) if or when Carper-D retires.
FL- 2022(Stephanie Murphy-D)
GA- 2020 or 2022(Stacy Abrams-D)
ID- 2020 or 2022( Janice McGeachin-R or Julie Ellsworth-R) if Risch-R and Crapo-R retire.
IN-
KY- 2020(Amy McGrath-D)
MT-
NJ
NM
OH
OK
OR- 2022(Kate Brown-D) if Wyden-D retires.
PA
RI
SC
SD
UT
VT-
VA
WY-2020(Liz Cheney-R) if Enzi-R retires.