State troopers responded to the scene, on Highway 512 just east of 7th Avenue SE, at about 12:10 p.m. Saturday after receiving a report of a serious one-car crash.
The driver of the vehicle, identified as Francis S. Gierczynski, 44, of Puyallup, was found dead at the scene.
A preliminary investigation found that Gierczynski was heading west on Highway 512 in a 1997 Mercury Cougar when he veered off the roadway and crashed into a tree. The car came to rest on its top after the crash.
The cause of the crash remains under investigation. Alcohol or drugs were not a factor in the accident, the State Patrol said.