| Mode: | Basketball |
| Year: | 2008–09 |
| Team: | BYU Cougars |
| Conference: | Mountain West Conference |
| Short Conf: | Mountain West |
| Record: | 25 - 8 |
| Conf Record: | 12 - 4 |
| Asst Coach1: | Dave Rice |
| Asst Coach2: | John Wardenburg |
| Asst Coach3: | Terry Nashif |
| Champion: | Mountain West Regular Season Co–Champions |
| Bowl Result: | first round |
The 2008–09 BYU Cougars men's basketball team represented Brigham Young University in the 2008–09 college basketball season. This was head coach Dave Rose's fourth season at BYU. The Cougars competed in the Mountain West Conference and played their home games at the Marriott Center.
Source[1]
| Name | Height | Weight (lbs.) | Position | Class | Hometown | Previous Team(s) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Charles Abouo | 6'5" | 210 | G/F | Fr. | Abidjan | Côte d'Ivoire |  | Brewster Academy | |
| 2 | Lamont Morgan Jr. | 5'10" | 170 | G | Jr. | Pomona, California | United States |  | Diamond Ranch HS Saddleback CC | |
| 4 | Jackson Emery | 6'3" | 185 | G | So. | Alpine, Utah | United States | | Lone Peak HS | |
| 5 | Archie Rose | 6'5" | 210 | G | Sr. | Nassau | Bahamas |  | Lee College | |
| 15 | James Anderson | 6'10" | 230 | F/C | Fr. | Page, Arizona | United States | | Page HS | |
| 20 | Matt Pinegar | 6'0" | 190 | G | Fr. | Provo, Utah | United States | | Timpview HS | |
| 30 | Lee Cummard | 6'7" | 190 | G | Sr. | Mesa, Arizona | United States | | Mesa HS | |
| 32 | Jimmer Fredette | 6'2" | 195 | G | So. | Glens Falls, New York | United States | | Glens Falls HS | |
| 34 | Noah Hartsock | 6'8" | 215 | F | Fr. | Bartlesville, Oklahoma | United States | | Bartlesville HS | |
| 35 | Michael Boswell | 6'9" | 215 | F | Fr. | Aloha, Oregon | United States | | Aloha HS | |
| 45 | Jonathan Tavernari | 6'6" | 215 | G/F | Jr. | São Bernardo do Campo | Brazil |  | Bishop Gorman HS | |
| 53 | Gavin MacGregor | 6'10" | 240 | F/C | Sr. | Ridgecrest, California | United States | | Burroughs HS | |
| 54 | Chris Miles | 6'11" | 235 | F/C | Jr. | Provo, Utah | United States | | Timpview HS | |
Source[2]
|-!colspan=9| Exhibition|-!colspan=9| Regular Season|-!colspan=10| Mountain West Conference Tournament|-!colspan=10| NCAA Tournament
See also: 2007–08 NCAA Division I men's basketball rankings. *AP does not release post-NCAA Tournament rankings.