Local Case Counts

We update confirmed and probable case numbers for the county and by city weekly. Depending on when you check the tables, 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. 

Case Count (cumulative since Jan. 2020) Last Updated: 2:30 p.m. 11/22/21 Change from 11/15/21
Confirmed  63,924 +1,712
Probable 7,545 +170
Deaths 806 +25*

Note: “Probable” cases include close contacts of a confirmed case who become symptomatic, positive antigen test, or positive serology/antibody test AND a credible history of COVID-like illness. For full definition of a "Probable" case, please see the Department of Health guidance

*Based on what is reported to the Health District daily, and a weekly reconciliation with state Department of Health data. 

To better align with the Washington State Department of Health’s data dashboard, the Snohomish Health District has incorporated positive antigen results into case reporting.

Effective April 19, the weekly case count update now includes a bar chart with total positive cases for the week broken into molecular and antigen cases. The rolling 2-week case rate has also been updated to incorporate antigen cases going back in time. This recalibration has resulted in a slight increase in rolling 2-week case rates.

Antigen test results are still positive cases, but conducted through rapid tests rather than molecular testing doing at laboratories. This addition of antigen-positive cases is not what’s driving the observed increase in the rolling 2-week COVID rate. The overall increase in case rates is due to increased transmission. Only 18% of confirmed cases over the past month are antigen-positive cases. 

**Delayed positive lab results have been recently received, slightly increasing case counts and rates. The overall epi curve remains the same.

***A monthly reconciliation against state data was completed, resulting in an overall increase in the total number of deaths to date.

Hospital Data

  Last updated 11/23/21 Change from 11/22/21 
COVID Positive
60 -1
COVID Ventilated 26 -1
Deaths 2 +2

Hospitalization data is updated daily on weekdays. Numbers represent COVID-positive patients currently hospitalized in Snohomish County.

COVID-19 Cases Reported in Snohomish County by Date (Updated Weekly)

case count by date

Snohomish County COVID-19 Case Rate per 100,000 for 2-week Rolling Period (updated Mondays)

case counts_dec 28

Snohomish County COVID-19 Related Deaths by Week (updated weekly)

Snohomish County COVID-19 Related Deaths by Week

Snohomish County Longterm Care Facility Associated COVID-19 Cases by Onset Date (updated weekly)

Snohomish County Longterm Care Facility Associated COVID-19 Cases by Onset Date


hospital admissions


covid testing by week 4-5

COVID rate and heat maps (click an image to view larger)

These maps are updated every two weeks. To see previous versions, see last section on our Reports page.

Case count heat map (September 19, 2021 - october 2, 2021)

Heat Map 10.18

Cases heat map (January 2020 - october 2, 2021) 

Heat Map to Date 10.18

Case Rates per 100,000 by ZIP (september 19, 2021 - october 2, 2021) 

ZIP Code Case Rates 10.18

COVID-19 Vaccinations by ZIP (As of october 10)

thumbnail_ZIP Code Init Vacc 10.10

Case Count by City, cumulative since Jan. 2020 (last updated 11/22/21)

City               Total     Survived**     
Arlington 5,085 4,427
Bothell* 4,901 4,489
Brier 388 358
Darrington 168 148
Edmonds 3,652 3,370
Everett 16,076 14,756
Gold Bar 425 379
Granite Falls 1,042 969
Index 13 12
Lake Stevens 4,946 4,470
Lynnwood 8,697 8,027
Marysville 8,208 7,358
Mill Creek 1,318 1,215
Monroe 3,343 3,061
Mountlake Terrace 1,637 1,533
Mukilteo 1,259 1,140
Snohomish 5,459 4,950
Stanwood 2,581 2,243
Sultan 727 657
Tulalip 1,205 1,138
Woodinville* 219 193
Woodway 86 79
Unknown/Other 34 29

City counts include both confirmed and probable cases. Numbers less than 5 are suppressed to protect medical privacy. Not all cases are within city limits and totals may include nearby unincorporated Snohomish County. Unknown includes cases still under investigation.

*Counts are for portions in Snohomish County only

**No longer in isolation, not hospitalized at this time, not deceased