Seattle Police have released a sketch of the suspect in one of the attacks in North Seattle.
There have been four recent attacks in the area and police are cautioning women to be alert.
Seattle police report three of the women identify their attacker as a white male, 20 to 30 years old, between 5'7 and 6'0, 140 to 160 pounds, with short brown hair.
The victim in a Northgate sexual assault attack said the man had sunken blue eyes and a tattoo under his left forearm. Her description was used to develop the sketch.
The police have posted details about where and when the attacks occurred and are looking for witnesses.
Anyone with information about any of the cases is asked to call 911.