Troy Smith (born July 20, 1984) is a former professional quarterback. He was drafted by the Baltimore Ravens in the fifth round of the 2007 NFL Draft, and also played for the NFL's San Francisco 49ers, the UFL's Omaha Nighthawks, and the CFL's Montreal Alouettes.

He played college football at Ohio State, was recognized as an All-American, and won the Heisman Trophy in 2006. With Smith at quarterback, Ohio State lost only two games in the 2005 regular season, and in only one of those was Smith the starter. The first was to the eventual BCS National Champion Texas Longhorns (which he did not start) and the other was to the Penn State Nittany Lions, co-Big Ten champions. In January 2006, he was named the Offensive MVP of the Fiesta Bowl, after leading the Buckeyes to a 34-20 win over the Notre Dame Fighting Irish. In the second week of the 2006 season, Smith and the Buckeyes took revenge for their 2005 loss to Texas. The top ranked Buckeyes won their rematch with the (again) second-ranked Longhorns, 24-7 Smith was one of five finalists for the 2006 Johnny Unitas Golden Arm Award, given to the top senior college quarterback.

Smith is a christian. He has advocated for passage of the FIT Kids Act. The act would require school districts to report on students' physical activity and to give health and nutritional information to children.