Monroe is a city in Snohomish County, Washington, United States. The population was 17,304 at the 2010 census. The population was 17,510 at 2013 Estimate from Office of Financial Management.
The history of Monroe is intertwined with that of the Great Northern Railway which pushed over the Cascade Range at Stevens Pass and worked its way down the Skykomish River Valley.
Monroe has also been host to a few Hollywood films, such as The Ring (2002), The Ring Two (2005), and The Butterfly Effect (2004).
Once per year from 1995 until 2000, the NASCAR Craftsman Truck Series held a race at the Evergreen Speedway located at the Evergreen State Fairgrounds.