Louis, a four-star prospect from Delray Beach (Fla.) Atlantic, caught 56 passes for 1,128 yards as a junior while earning third-team all-state honors.
Listed at 5-11, 180 pounds, Louis is ranked by Scout.com as the No. 26 wideout in the country.
He becomes verbal commitment No. 10 for OSU's class of 2010 and the first wide receiver to join the class.