The 1989–90 UC Irvine Anteaters men's basketball team represented the University of California, Irvine during the 1989-90 NCAA Division I men's basketball season.
The Anteaters were led by tenth year head coach Bill Mulligan and played their home games at the Bren Events Center.
They finished the season 5–23 and 3–13 in Big West play.
They advanced to the Big West Conference tournament where they lost to the Cal State Fullerton Titans.
The 1988–89 UC Irvine Anteaters men's basketball team finished the season 12–17 and 8th in Big West play with a conference record of 8–10.