Dow Constantine

James Dow Constantine is an American lawyer, urban planner, and politician who is the chief executive officer of Sound Transit. He was appointed in 2025 after resigning as county executive of King County, Washington, a position he had held since 2009. A member of the Democratic Party, Constantine served on the King County Council from 2002 to 2009, and in the Washington State Legislature from 1997 to 2002.