Otis Harris Jr. (born June 30, 1982, in Edwards, Mississippi) is an American track and field athlete.

He twice won the 400 meters in the junior Olympics and led his team to three state championships.

As a Gamecock, he was a member of their 2002 NCAA championship 4 × 400 m relay team and finished as the runner-up in the 400 m in 2003.

Derrick Brew came in third and all three athletes together with Darold Williamson won a gold medal in the 4 × 400 m relay for the United States.

Harris trains with his college coach Curtis Frye in Columbia, South Carolina.