| Position: | Defensive end |
| Number: | 92, 94 |
| Birth Date: | 19 April 1976 |
| Birth Place: | New Orleans, Louisiana, U.S. |
| Height Ft: | 6 |
| Height In: | 5 |
| Weight Lb: | 260 |
| Draftyear: | 1999 |
| Draftround: | 6 |
| Draftpick: | 176 |
| High School: | Lakenheath (UK) American |
| College: | Louisiana–Monroe |
| Teams: |
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| Statlabel1: | Tackles |
| Statvalue1: | 19 |
| Statlabel2: | Sacks |
| Statvalue2: | 2.0 |
| Pfr: | BarnLi20 |
Lionel Barnes, Jr. (born April 19, 1976) is a former American football defensive end in the National Football League (NFL). He played for the St. Louis Rams, the Indianapolis Colts, and the Jacksonville Jaguars.
Barnes played defensive end at the University of Louisiana-Monroe, leading the team in sacks with 16 in 1998, his senior season.
Barnes was drafted by the Rams in the sixth round of the 1999 NFL draft and was on the roster for two seasons, playing in four games.[1]
After he was released by the Rams, the Colts signed Barnes and he played in seven games over the 2000 and 2001 NFL seasons.
In 2003, Barnes was signed by the Jacksonville Jaguars. In his first season there he played in 13 games and made 13 tackles plus two sacks. The following year, he earned the starting job and started the first three games of the season. The Jaguars placed Barnes on injured reserve in mid-October because of a shoulder injury. Barnes was hurt September 19, 2004, against Denver.
On April 4, 2005, the Jacksonville Jaguars released Barnes.