We update most information on this page biweekly. Depending on when you check, numbers may vary from those reported by the state Department of Health. Because new reports of positive tests come in and disease investigations are done throughout the week, the numbers vary based on when the data is run. Please check the "Data as of" or "Last Updated" note to confirm the most current number.
CDC Community Level update (current numbers in blue)
Last updated: 9/16/23
COVID-19 Cases Reported in Snohomish County by Date
Snohomish County COVID-19 Case Rate per 100,000 for 7-day Rolling Period
*Starting in April 2022, case-rate data are by week, not a rolling 2-week time frame. This is in alignment with Washington State Department of Health
Case Rates per 100,000 by ZIP
The Snohomish Health Department is no longer reporting on city-level case counts as part of weekly or monthly updates. Please refer to the ZIP Code case rate map above for case rates in different areas of the county.