Snohomish County sheriff's deputies responded to the scene, along Airport Road between Highway 99 and Admiralty Way, at about 6 a.m. after receiving reports of the accident, said spokeswoman Shari Ireton.
The male pedestrian was found dead at the scene when deputies arrived. Investigators later identified him as 51-year-old David Carl Murray of Mukilteo.
A preliminary investigation found that a truck was headed east on Airport Road and struck the pedestrian as he tried to cross the street. The driver, a Mukilteo man, remained at the scene after the crash and is cooperating with investigators.