Washtenaw County COVID-19 Data

Updated: March 27, 2023 3:00pm

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Case total table will be updated daily, Monday-Friday. The hospitalization chart and death chart will be updated on Monday and Thursday. Demographic tables will be updated the first week of the month on Thursday. The past 24-hour case count will be updated daily, Monday-Friday. The "Weekly Summary of Key COVID-19 Indicators in Washtenaw County" is updated weekly on Fridays

In addition to reported testing results, wastewater samples are also being monitored to track the presence of COVID-19 in our community. To see local trends, we recommend using the University of Michigan Wastewater Dashboard. CDC also has a wastewater tracker, but data may be limited or less frequently updated than the UM site. Read more about COVID-19 wastewater surveillance in Michigan here.

State and local data is also updated on the Michigan coronavirus website on Tuesday. You can see data and modeling updates from the state here

Please note: The source for all Washtenaw County COVID data on this webpage (except where noted) is the Michigan Disease Surveillance System (MDSS). The information in these charts are provisional and subject to change. Use care interpreting. 

  • Total cases include: Outpatient, Hospitalized, Deceased, and Recovered individuals.
  • Confirmed cases: Individuals who have a PCR positive lab result for COVID-19.
  • Probable cases: Individuals with a positive rapid antigen test conducted in a healthcare setting and no confirmatory testing (PCR or nucleic acid test). A person may also be classified as a probable case if they are a close contact to a case and have symptoms consistent with COVID-19.  Individuals with a positive home antigen test who are symptomatic or linked to another positive case would also be a probable case of COVID (note that most home antigen tests are not reported to public health).
  • Students: College students living locally are included in Washtenaw County case counts. 

28 cases (22 confirmed cases and 6 probable cases), 2 hospitalizations (7 total over the weekend), and 0 deaths reported in the last 24 hours. 
(as of 3/27/23 at 10:00 am).

Washtenaw County Two-week Snapshot (Confirmed and Probable cases diagnosed from 3/9 to 3/22), updated weekly

*As of 11/03/2022, the weekly case rates for 5-11 and 12-17 year olds now include positive tests reported in MDSS and home antigen tests reported from schools. * As of 9/15/22: the Two-week Snapshot includes all probable and confirmed cases reported in Washtenaw County.
Note: This snapshot is intended to provide information on areas of highest risk/concern.  
CDC Community Level LOW
Weekly case rate in Washtenaw County residents (per 100k; from MI Safe Start) 68.3
Weekly case rate in 5-11 year olds (per 100k) from 2/28 - 3/6/2023 271.5
Weekly case rate in 12-17 year olds (per 100k) from 2/28 - 3/6/2023 228.4
Number of confirmed and probable cases in Washtenaw County residents 536
Weekly test positivity rate (from MI Safe Start) 9.8
Number of Hospitalizations (%) 60 (11.2%)
Hospitalization Age Range (median age) 1 month - 98 years (73 years)
Number of Deaths 1
% Asian 8%
% Black or African American 14%
% White 59%
% Other or Unknown Race 18%
% Hispanic or Latino (all races) 2%
% High-risk congregate residents (nursing homes, correctional facilities, homeless shelters) 5.8%
% 0 to 9 years 7%
% 10 to 17 years 5%
% 18 to 22 years 9%
% 23 to 29 years 12%
% 30 to 49 years 24%
% 50 to 64 years 18%
% Over 65 years 25%
Number (%) of Washtenaw County cases not part of UM/EMU outbreaks 469 (87.5%)

PDF versions of the current and previous snapshots are available here.

Weekly Summary of Key COVID-19 Indicators in Washtenaw County

Weekly Summary of Key COVID19 Indicators in Washtenaw County

PDF versions of the current and previous weekly summaries are available here.

Total Confirmed and Probable COVID-19 Cases in Washtenaw County Residents (as of 3/27)

  Total cases Total hospitalizations % cases hospitalized % cases admitted
to ICU
Confirmed Cases
92932 4284 5% 0.6% 607
Probable Cases 
(Updated Mon and Thur)
17479 45 0.3% 0% 41
Confirmed and Probable Cases 110411 4329 4% 0.5% 648

Lab-Confirmed COVID-19 cases in Washtenaw County by Age Group (as of 3/2), updated monthly

Age Group % of cases % of hospitalized % of deaths
0 - 17 years 15% 2.2% 0%
18 - 24 years 21% 2.4% 0%
25 - 39 years 25% 10% 2%
40 - 49 years 12% 8% 2%
50 - 59 years 11% 14% 9%
60 - 69 years 8% 20% 15%
70 - 79 years 4% 20% 27%
80+ years 2% 23% 45%

Lab-Confirmed COVID-19 Cases in Washtenaw County by Sex (as of 3/2), updated monthly

Sex % of cases % of hospitalized % of deaths
Female 53% 50% 42%
Male 46% 50% 58%

Lab-Confirmed COVID-19 Cases in Washtenaw County by Race (as of 3/2), updated monthly

Racial or Ethnic Group % of cases % of hospitalized % of deaths % of county population
Am. Indian or Alaska Native 0.3% 0.6% 0.5% 0.5%
Asian 7% 3% 1.7% 1.5%
Black or African American 12% 23% 20% 19%
Native Hawaiian or Pac. Islander 0.1% 0.2% 0.5% 0.5%
White 60% 69% 75% 74%
Unknown/Other race 20% 5.2% 3.1% 3.0
Hispanic or Latino (all races) 4% 3.6% 3.6% 3.7%

Archived COVID-19 Data

The following graphs are no longer being updated:

*Interpretation Notes for Charts and Tables

  • Information in these charts is provisional and subject to change.
  • Use care interpreting charts and tables. Numbers for recent days and weeks may look low for several reasons, including pending test results or delayed symptom onset information. Numbers are updated at the start of the following week. 
  • Total cases include: Outpatient, Hospitalized, Deceased, and Recovered individuals.
  • Confirmed cases: Individuals who have been tested and received a laboratory-confirmed positive result. 
  • Probable cases: Individuals that have been directly linked or in close contact to a confirmed case, have symptoms consistent with COVID-19, but did not have confirmatory testing.

Additional Data


We know viruses do not discriminate based on location, race, ethnicity, or national origin. However, viruses like COVID-19 can highlight health disparities that are deeply rooted in our society. COVID-19 is disproportionately affecting some communities in Washtenaw County, including Ypsilanti and Ypsilanti township zip codes and our county’s African American population. Similar disparities have also been seen in Michigan and elsewhere in the United States. Read more about why these inequities may be present, how the Washtenaw County Health Department is working with communities facing health disparities, and community resources.

People of every race, economic status, and age are at risk for coronavirus and should continue taking every precaution to help slow the spread of illness. We must continue to push for policies that address the inequities that this pandemic has brought to light, including paid time off and access to health insurance. Discrimination and disparities are unjust and put us all at greater risk. Individuals in need of essential resources can view Washtenaw County Office of Community and Economic Development’s list of community services or call 2-1-1.

We have a responsibility to provide data that reflects health inequities so that everyone can take action and have the ability to protect themselves from COVID-19. We continue to work with community partners to address these inequities.