| Sport: | Women's basketball |
| Year: | 2018–19 |
| Team: | Washington State Cougars |
| Conference: | Pac-12 Conference |
| Short Conf: | Pac-12 |
| Record: | 9–21 |
| Conf Record: | 4–14 |
| Hc Year: | 1st |
| Asst Coach2: | Jackie Nared |
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.
[1] |-!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
2018–19 NCAA Division I women's basketball rankings
| + Regular Season Polls | Poll | Pre- Season | Week 2 | Week 3 | Week 4 | Week 5 | Week 6 | Week 7 | Week 8 | Week 9 | Week 10 | Week 11 | Week 12 | Week 13 | Week 14 | Week 15 | Week 16 | Week 17 | Week 18 | Week 19 | Final |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AP | N/A | ||||||||||||||||||||
| Coaches |
| Increase in ranking | |||
| Decrease in ranking | |||
| Not ranked previous week | |||
| (RV) | Received Votes | ||
| (NR) | Not Ranked |