| Year: | 2019 |
| Conference: | Big West Conference |
| Division: | I |
| Gender: | Men's |
| Teams: | 8 |
| Arena: | Honda Center |
| City: | Anaheim, California |
| Champions: | UC Irvine |
| Titlecount: | 2nd |
| Coach: | Russell Turner |
| Coachcount: | 2nd |
| Mvp: | Max Hazzard |
| Mvpteam: | UC Irvine |
| Television: | ESPN3 ESPNU ESPN2 |
The 2019 Big West Conference men's basketball tournament was the postseason men's basketball tournament for the Big West Conference of the 2018–19 NCAA Division I men's basketball season. It was held from March 14 through March 16, 2019 at the Honda Center in Anaheim, California. UC Irvine defeated Cal State Fullerton 92–64 in the championship game to win the tournament, and received the conference's automatic bid to the NCAA tournament.[1] The championship was the second for UC Irvine in the Big West, last winning it in 2015.
The top eight conference teams were eligible for the tournament. Teams were seeded by record within the conference, with a tiebreaker system to seed teams with identical conference records. Teams were reseeded after the quarterfinals.
| Seed | School | Conference | Tiebreaker | |
|---|---|---|---|---|
| 1 | align=left | 15–1 | ||
| 2 | 10–6 | 2–0 vs Hawaii | ||
| 3 | 10–6 | 0–2 vs Hawaii | ||
| 4 | 9–7 | |||
| 5 | 8–8 | |||
| 6 | 7–9 | 1–1 vs UCSB | ||
| 7 | 7–9 | 0–2 vs. UCSB | ||
| 8 | 4–12 | |||
| DNQ | 2–14 |
| Game | Time | Matchup | Score | Television | |
|---|---|---|---|---|---|
| Quarterfinals – Thursday, March 14 | |||||
| 1 | 12:00 pm | No. 2 UC Santa Barbara vs. No. 7 Cal State Northridge | 71–68 | ESPN3 | |
| 2 | 2:30 pm | No. 3 Cal State Fullerton vs. No. 6 UC Davis | 75–71 | ||
| 3 | 6:00 pm | No. 1 UC Irvine vs. No. 8 UC Riverside | 63–44 | ||
| 4 | 8:30 pm | No. 4 Hawaii vs. No. 5 Long Beach State | 66–68 | ||
| Semifinals – Friday, March 15 | |||||
| 5 | 6:30 pm | No. 1 UC Irvine vs. No. 5 Long Beach State | 75–67 | ESPN3/ESPNU | |
| 6 | 9:00 pm | No. 2 UC Santa Barbara vs. No. 3 Cal State Fullerton | 58–64 | ESPNU | |
| Championship – Saturday, March 16 | |||||
| 7 | 8:30 pm | No. 1 UC Irvine vs. No. 3 Cal State Fullerton | 92–64 | ESPN2 | |
| Game times in PT. Rankings denote tournament seeding. All games held at Honda Center, Anaheim, California[2] | |||||