Welcome to the Snohomish County Road Atlas

The electronic format of Snohomish County’s Road Atlas went on-line 2003. It is updated quarterly.

The Road Atlas was specifically developed for the Public Works Department identifying County-maintained roads not only by name, but by road log number.

County roads data were obtained from the Public Works Street Centerline coverage. Data for freeways, state roads and major city streets were obtained from the Major Roads coverage. Hydrology data was obtained from Washington State Department of Natural Resources. City boundaries data were obtained from the Auditor’s Municipalities Coverage. Schools and fire stations data were obtained from the Auditor’s Office Public Buildings, Services and Landmarks Coverage. Section, township and range lines data were obtained from the PLSS Coverage. Bridges data were obtained from the Public Works Bridge Coverage. Signals data were obtained from Public Works Signal Coverage.

note: All maps are in PDF format and require Adobe Reader® to view.