Police said 22-year-old Jonathan Meyer had been drinking with a friend Friday night when he tried to drop to a second-story balcony and missed.
The Lewiston Tribune reports he was unconscious when police arrived. He was taken to Pullman Regional Hospital and later transferred to a Spokane hospital.
The university says Meyer is a senior from Kirkland.
This is the third alcohol-related fall at WSU and the University of Idaho in the past month. A 19-year-old WSU student was injured in a three-story fall Sept. 14 at a fraternity. A 21-year-old University of Idaho student was injured in a two-story fall Sept. 12 at his fraternity.