State police at Wyoming identified the deceased as 39-year-old Scott Luzetsky of Roosevelt Street, Edwardsville.
Luzetsky was pronounced dead at the scene by the Luzerne County Coroner's Office.
The shooting happened at about 1:50 a.m. at the tavern.
Stephen Hollman, 29, of East Main Street, Plymouth, suffered a gunshot wound to his head. He is listed in critical condition at Geisinger Wyoming Valley Medical Center in Plains Township.
William Allabaugh, 24, of East Main Street, Plymouth, suffered multiple gunshot wounds and is in critical condition at Geisinger Wyoming Valley.
State police said a suspect has been identified, who is currently in a hospital.
Firearms used in the shooting have been recovered.
State police believe the shooting was isolated and there is no immediate threat to the public.
It was not immediately known when an autopsy will be scheduled.