This information shows how COVID-19 has impacted Marin County community residents since the first case. This data includes facility patients and staff who live in Marin County. This data does not include San Quentin inmates.
This chart displays the daily count and 7-day rolling average of new confirmed cases. Due to the time required for reporting, case data is lagged by 3 days. Positive cases may be under-reported for up to 10 days.
Data Source: COVID-19 Case Disposition
The chart displays the the change in cumulative (total) COVID-19 deaths by date of the first positive COVID-19 test.
Data Source: COVID-19 Case Disposition
COVID-19 Testing and Percent Positivity
The following charts show the daily count and 7-day rolling average of testing volume and percent positivity. This data is collected and calculated by the California Department of Public Health (CDPH). Due to the time required for reporting, data is lagged by 3 days. Testing counts may be under-reported for up to 10 days.
Data Source: COVID-19 Tests (CDPH)
Cumulative hospitalizations represent all Marin County residents who have been hospitalized for COVID-19, and the Daily Census reflects COVID-19 patients currently in the hospital (lagged by one-day). Daily census values include patients from San Quentin hospitalized in Marin County hospitalized. Daily Census values do not include patients hospitalized at Kentfield Rehabilitation Hospital since it neither admits acute patients or has ICU beds.
Data Source: CDPH Hospitalization Data
COVID-19 Population Characteristics
Demographics of Total COVID-19 Cases, Hospitalizations, and Deaths
The following charts show the proportion of total COVID-19 Cases, Hospitalizations, and Deaths by known Race/Ethnicity, Age Category, and Gender. Comparing demographic information for confirmed COVID-19 cases to the demographics in our community's population helps inform us about which groups may be more impacted by COVID-19.
Data Sources: COVID-19 Cumulative Demographics
Demographic Trends in COVID-19 Cases
The following charts show the 7-day moving average of new cases by Race/Ethnicity and Age Category. A 7-day moving average is calculated by adding the case counts by test date of 7 days together and then dividing by 7. The day displayed on the chart is the 7th day.
Facility Staff and Residents
This table shows how COVID-19 has impacted residents of long-term care facilities in Marin County. Facilities include Residential Care Facilities (RCFs), Skilled Nursing Facilities (SNF), Independent Living (IL), and Other Group Living (OGL) facilities. Current positive staff and current positive patients include those who have tested positive for COVID-19 in the last 14 days.
COVID-19 Cases by Geography
Mapping cases by geographic regions helps us view where COVID-19 cases have been diagnosed in our community. The map below shows the cumulative and 30-day number of confirmed COVID-19 cases and cumulative and 30-day rates of COVID-19 cases per 100,000 residents by city and community in Marin County since March 2020. Note that the number of confirmed cases in a given community are reflective of testing. This map is interactive, click on each jurisdiction to view the name of the community/city, the total population for that area, the cumulative and 30-day number of COVID-19 cases, and the cumulative and 30-day COVID-19 case rate per 100,000 residents. Because the total population in one jurisdiction can be vastly different from another, the case rate per 100,000 residents helps us better understand the concentration of cases among the total population for that jurisdiction. This map is based on the residence provided by COVID-19 cases during the investigation process (also referred to as contact tracing). Communities with less than 10 cases do not have their case counts shared to ensure that individuals are not identifiable to the public. All data are subject to change as we may learn new information during a case investigation. If the map fails to load click here.
Marin County Public Health has routine quality improvement procedures in place to provide the most accurate and timely data as possible. Mapping procedures were updated in November 2020 to further improve our ability to report COVID-19 case counts by geographic location, including updating our methodology to account for corrections to case addresses throughout a case investigation. All cases reported for San Quentin only include those reported among community residents.
Geographic data are unavailable for approximately 5% of cases as a result of reporting delays or challenges.
Looking at trends in all-cause deaths may help us to identify if we are seeing fewer or greater number of deaths than usual in Marin County. Seeing a sustained spike in the number of deaths occurring in a given week in 2020 compared to 2018-19 may demonstrate COVID-19's impact on Marin County. The line chart below shows the two-week rolling average of all-cause deaths among Marin County community residents by week in 2020 as compared to 2018 and 2019 combined. The date on the horizontal axis represents the last day in the two-week rolling average. For example, the two-week rolling average of 36 for the week ending on April 25 (representing the week of April 17-25), means that there were 76 deaths recorded in the two week period prior to April 26 (April 11-25). Note this chart only includes deaths among Marin County community residents and does not include deaths among individuals incarcerated at San Quentin prison. Between January 1, 2018 to June 30, 2020 the two-week rolling average of deaths among people incarcerated in San Quentin was between 0-1. To view updated data on COVID-19 deaths among San Quentin COVID-19 cases, visit the California Department of Correction's website.
As of January 5, 2021 this COVID-19 surveillance website no longer includes ED and EMS respiratory-illness charts. To view data on respiratory-illness surveillance visit the Marin Flu Surveillance Data webpage.
How to Use
- For best viewing options across most devices select the "Full Screen" icon in the very bottom right hand corner of each dashboard.
- Adjusting the Date slider above charts will modify the date range in the view; move the date sliders to the right or left with a mouse. This allows users to zoom into smaller periods of time.
- To highlight particular features (lines/bars) in the charts, select an item in the legend either by clicking it with a mouse or tabbing to it and pressing the Spacebar.
- To see the data behind each chart select the "Download" icon in the bottom right of the dashboard and select "Crosstab", then select the specific chart of interest. Full datasets are linked below each dashboard, directing the user to Marin County's Open Data Portal. Another way to see a data table is to tab to put focus on a chart and then press Enter.
Every attempt has been made to enable the data visualizations accessible for keyboard navigation and screen readers. Tableau provides specific keyboard navigation instructions on their website. If you have a disability and need assistance with the information on this page, use the COVID-19 contact form to submit your access questions or call the COVID-19 call line at 415-473-7191 (711 for CA Relay).