The 2018–19 Washington State Cougars women's basketball team represented Washington State University during the 2018–19 NCAA Division I women's basketball season. The Cougars, led by first year head coach Kamie Ethridge, played their home games at the Beasley Coliseum and were members of the Pac-12 Conference. They finished the season 9–21, 4–14 in the Pac-12 to finish in tenth place. They lost in the first round of the Pac-12 women's tournament to California.

Roster

Schedule

!colspan=9 style=| Exhibition

!colspan=9 style=| Non-conference regular season

!colspan=9 style=| Pac-12 regular season

!colspan=9 style=| Pac-12 Women's Tournament

Rankings 2018–19 NCAA Division I women's basketball rankings

+ Regular season pollsPoll Pre-season Week2 Week3 Week4 Week5 Week6 Week7 Week8 Week9 Week10 Week11 Week12 Week13 Week14 Week15 Week16 Week17 Week18 Week19 Final AP N/A Coaches + Legend   Increase in ranking   Decrease in ranking   Not ranked previous week (RV)   Received votes (NR)   Not ranked

See also 2018–19 Washington State Cougars men's basketball team

References