David Boyle, 48, was last seen Nov. 3 leaving his Marysville home. He was driving a red 2006 Chrysler Pacifica.
Marysville police are investigating. They don't suspect foul play, a spokesman said.
Boyle works at the Marysville YMCA and coaches football, girl's basketball and boy's baseball at the Marysville School District.
He grew up in Everett and has lived in Marysville for nearly two decades.
He is described as white, 6 feet tall and weighing about 180 pounds. He has blue eyes and gray hair.
Anyone with information or who sees him should call Marysville police at 360-363-8300.
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