Derrick JaVaughn Byars (born April 25, 1984) is an American entrepreneur and former professional basketball player. Collegiately, he played for Virginia, and later for Vanderbilt. He was drafted 42nd overall in the 2007 NBA draft.

Byars attended Ridgeway High School in Memphis, where he played for head coach Wesley Henning and won two Tennessee Secondary School Athletic Association (TSSAA) Class AA State Championships.

As a sophomore (1999–2000), Byars was an honorable-mention All-State selection and led the Roadrunners to the Class AA State Championship. He averaged 16.4 points, 6.5 rebounds and 5.4 assists per game.

As a junior, he again earned honorable mention All-State honors and was named Ridgeway's Most Valuable Player and District 15-AA MVP. He averaged 20.5 points, 7.2 rebounds and 5 assists.

As a senior (2001–02), he averaged 23.2 points, 10 rebounds and 4.5 assists and led Ridgeway to its second TSSAA Class AA State Championship in three years. He was a fourth-team Parade All-America selection, the Gatorade Player of the Year in Tennessee, the TSSAA Class AA Tournament Most Valuable Player and first-team All-State.

Byars also excelled in the classroom, finishing high school with a 3.9 GPA.

Byars played for two seasons under then-head coach Pete Gillen at Virginia. He started 16 of Virginia's 31 games his freshman season (2002–03) and averaged 6.5 points per game. In his sophomore season (2003–04), he started 18 of Virginia's 31 games and averaged 7.5 points per game.

Disappointed by his lack of playing time, Byars decided to transfer from Virginia. Vanderbilt emerged as a leading candidate due to Byars' friendships with players on the team and the Commodores' recent run to the Sweet 16 of the NCAA Tournament, but the Commodores had no scholarship positions available. Days before Byars was due to announce his transfer to Mississippi, Vanderbilt reserve guard Adam Payton decided to transfer to William & Mary, freeing up a scholarship for Byars.