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 [1] 2018–19 NCAA Division I women's basketball rankings