The Eastside Rail Corridor, officially Eastrail, is a rail right of way where a rail trail has been under development in the Eastside suburbs of Seattle, Washington. The corridor follows the path of the former Woodinville Subdivision from Renton to the City of Snohomish at Snohomish Junction. As of 2017, the northern portion was still in operation by Eastside Freight Railroad.

The Eastside of the King County, Washington area in the United States is a collective term for the suburbs of Seattle located on the east side of Lake Washington.