1989–90 UC Santa Barbara Gauchos men's basketball team

1989–90 UC Santa Barbara Gauchos men's basketball
NCAA tournament, second round
ConferenceBig West Conference
Record21–9 (13–5 Big West)
Head coach
Home arenaThe Thunderdome
1989–90 Big West men's basketball standings
Conf.Overall
TeamW L PCTW L PCT
No. 24 New Mexico State162 .889265  .839
No. 2 UNLV162 .889355  .875
UC Santa Barbara135 .722219  .700
Long Beach State126 .667239  .719
Utah State810 .4441416  .467
Pacific711 .3891514  .517
Cal State Fullerton612 .3331316  .448
San Jose State513 .278820  .286
Fresno State414 .2221019  .345
UC Irvine315 .167523  .179
1990 Big West tournament winner
Rankings from AP poll

The 1989–90 UC Santa Barbara Gauchos men's basketball team represented the University of California, Santa Barbara during the 1989–90 college basketball season. They were led by head coach Jerry Pimm in his 7th season at UCSB. The Gauchos were members of the Big West Conference and played their home games at the UC Santa Barbara Events Center, also known as The Thunderdome.

UCSB finished the season 21–9, 13–5 in Big West play to finish third in the conference regular season standings. They received an at-large bid to the NCAA tournament. As the No. 9 seed in the Southeast Region, they beat Houston in the first round before losing to No. 1 seed Michigan State in the second round.

The season was a memorable one for UCSB fans. The 1989–90 team beat eventual National champion UNLV in front of a raucous crown at The Thunderdome on February 26, 1990. It would end up being UNLV's only loss over a stretch of 55 games between the 1989–90 and 1990–91 seasons. The Gauchos also won the first NCAA Tournament game in school history.