Malik Abdul-Rauf, of Nicholasville, Kentucky, was arrested Wednesday in connection to the July 29 stabbing in the Cincinnati Zoo & Botanical Garden near the gift shop.
Court documents state Abdul-Rauf and another man, Mark Lanham, were in a "verbal altercation" with a man before they physically attacked him at about 4 p.m.
The two men then left the zoo while the stabbing victim remained behind, Cincinnati Zoo Communications Director Michelle Curley said. Both suspects were identified in a lineup.
Sgt. Eric Franz of the Cincinnati Police Department said the stabbing victim had serious, non life-threatening injuries.
Crews took him to University of Cincinnati Medical Center for treatment.