| Sport: | Women's Basketball |
| Sex: | none |
| Year: | 1990–91 |
| Prev Year: | 1989–90 |
| Next Year: | 1991–92 |
| Team: | Tennessee Lady Volunteers |
| Conference: | Southeastern Conference |
| Short Conf: | SEC |
| Coachrank: | 1 |
| Aprank: | 4 |
| Record: | 30–5 |
| Conf Record: | 6–3 |
| Head Coach: | Pat Summitt |
| Hc Year: | 17th |
| Asst Coach1: | Mickie DeMoss |
| Asst Coach2: | Holly Warlick |
| Arena: | Thompson-Boling Arena |
| Champion: | NCAA tournament National Champions |
The 1990–91 Tennessee Lady Volunteers basketball team represented the University of Tennessee as a member of the Southeastern Conference during the 1990–91 women's college basketball season. Coached by Pat Summitt, the Lady Volunteers finished 30–5 and won their third national championship in a 5-year span. The Lady Vols started off the season ranked number six.
|-!colspan=9 style=| Regular season
|-!colspan=9 style=| SEC tournament
|-!colspan=9 style=| NCAA tournament[2]
See main article: 1990–91 NCAA Division I women's basketball rankings.