Massachusetts Coronavirus Map and Case Count

0
2,000
4,000
6,000
8,000 cases
Mar. 2020
Apr.
May
Jun.
Jul.
Aug.
Sept.
Oct.
Nov.
Dec.
Jan. 2021
Feb.
Probable data released
New cases
7-day average
Total reported On Feb. 27 14-day change
Cases 581,148 1,700 –21%
Deaths 16,118 43 –43%
Hospitalized 785 –35%

Day with reporting anomaly.

Hospitalization data from the Covid Tracking Project; 14-day change trends use 7-day averages.

At least 43 new coronavirus deaths and 1,700 new cases were reported in Massachusetts on Feb. 27. Over the past week, there has been an average of 1,702 cases per day, a decrease of 21 percent from the average two weeks earlier.

Average daily cases per 100,000 people in past week
Few or no cases
Share of population with a reported case
No cases reported
Double-click to zoom into the map.
Use two fingers to pan and zoom. Tap for details.
Sources: State and local health agencies. Population and demographic data from Census Bureau.
About this data For total cases and deaths: The map shows the known locations of coronavirus cases by county. Circles are sized by the number of people there who have tested positive or have a probable case of the virus, which may differ from where they contracted the illness. For hot spots: The hot spots map shows the share of population with a new reported case over the last week.

As of Sunday evening, there have been at least 581,148 cases and 16,118 deaths in Massachusetts since the beginning of the pandemic, according to a New York Times database.

Reported cases and deaths by county

This table is sorted by places with the most cases per 100,000 residents in the last seven days. Charts are colored to reveal when outbreaks emerged.

Total
cases
Per 100,000 Total
deaths
Per 100,000 Daily avg.
in last
7 days
Per 100,000 Daily avg.
in last
7 days
Per 100,000 Weekly cases per capita
Fewer More
Massachusetts 581,148 8,432 16,118 234 1,702 25 41.1 0.60
March 1
Feb. 27
Massachusetts heatmap
Hampden › 41,742 8,950 1,332 286 138 30 3.9 0.83
Hampden heatmap
Suffolk › 78,277 9,737 1,697 211 206 26 3.6 0.44
Suffolk heatmap
Hampshire › 7,395 4,598 261 162 39 24 0.9 0.53
Hampshire heatmap
Essex › 83,792 10,620 2,163 274 190 24 4.4 0.56
Essex heatmap
Plymouth › 40,274 7,727 1,294 248 120 23 3.3 0.63
Plymouth heatmap
Norfolk › 45,485 6,436 1,617 229 159 23 2.9 0.40
Norfolk heatmap
Bristol › 55,734 9,861 1,501 266 126 22 4.4 0.78
Bristol heatmap
Worcester › 65,363 7,869 2,039 245 177 21 5.9 0.71
Worcester heatmap
Barnstable › 10,088 4,736 404 190 41 19 2.0 0.94
Barnstable heatmap
Middlesex › 111,798 6,937 3,438 213 293 18 8.3 0.51
Middlesex heatmap
About this data Weekly cases per capita shows the share of population with a new reported case for each week. Weeks without a reported case are shaded gray. The daily average is calculated with cases and deaths that were reported in the last seven days.

To Our Subscribers

The public, medical researchers, and government agencies continue to rely on our comprehensive tracking of the pandemic. Thank you for helping us uncover the facts.

Learn more about this project.

The New York Times is engaged in a comprehensive effort to track details about every reported case in the United States, collecting information from federal, state and local officials around the clock. The numbers in this article are being updated several times a day based on the latest information our journalists are gathering from around the country.

The New York Times has found that official tallies in the United States and in more than a dozen other countries have undercounted deaths during the coronavirus outbreak because of limited testing availability.

Daily reported new cases

0
2,000
4,000
6,000
8,000 cases
Mar. 2020
Apr.
May
Jun.
Jul.
Aug.
Sept.
Oct.
Nov.
Dec.
Jan. 2021
Feb.
Probable data released
New cases
7-day average

Daily reported deaths

0
100
200 deaths
Mar. 2020
Apr.
May
Jun.
Jul.
Aug.
Sept.
Oct.
Nov.
Dec.
Jan. 2021
Feb.
Probable data released
New deaths
7-day average
These are days with a reporting anomaly. Read more here. Note: The seven-day average is the average of a day and the previous six days of data.

Daily case and death reports show the severity of the pandemic over time. The picture can be put into further context by considering the number of tests performed and people hospitalized.

Daily reported specimens tested

0
50,000
100,000 tests
Mar. 2020
Apr.
May
Jun.
Jul.
Aug.
Sept.
Oct.
Nov.
Dec.
Jan. 2021
Feb.
New tests
7-day average

Hospitalizations

0
1,000
2,000
3,000
Mar. 2020
Apr.
May
Jun.
Jul.
Aug.
Sept.
Oct.
Nov.
Dec.
Jan. 2021
Feb.
Covid patients in hospitals that day
7-day average
Source: Testing and hospitalization data from the Covid Tracking Project.
About this data Currently hospitalized is the number of patients with Covid-19 reported by the state to be in a hospital on that day. Dips and spikes could be due to inconsistent reporting by hospitals. Tests represent the number of individual P.C.R. viral test specimens reported tested that day.

If the previous level of testing was low, and hospitalizations are not increasing, a rise in daily cases could be explained as a result of increased testing. If daily tests have been increased and cases and hospitalizations have fallen or stayed low, that is a sign that the situation is improving or under control. Hospitalizations and deaths usually lag behind new cases, as it takes time for symptoms to develop and worsen.

Because the definitions used for testing and hospitalization data vary between states, it is not always possible to compare that data in one state to the figures reported in another.

We’re tracking restrictions in Massachusetts »

Since March, The Times has paid special attention to cases in nursing homes, food processing plants, correctional facilities and now at colleges and universities. Information on cases linked to these places comes from official releases by governments, companies and institutions directly. The Times is publishing lists of groupings of 50 or more cases related to a specific site, workplace, school or event.

Cases connected to Cases Location
+ Prisons and jails 5,522 cases at 18 prisons
+ Colleges and universities 5,034 cases at 57 schools
+ Nursing homes 653 cases at 9 facilities
+ Other 612 cases at 6 clusters

The counts in this table of coronavirus cases at individual nursing homes were last updated as recently as Jan. 12, 2021. Since then, we have continued to update state-level totals for cases and deaths in long-term care facilities.

About the data

In data for Massachusetts, the Times primarily relies on reports from the state. Massachusetts typically releases new data each day. Weekend counts may be lower because fewer sources report to the state. The state reports cases and deaths based on a person’s permanent or usual residence.

The Times has identified the following reporting anomalies or methodology changes in the data:

April 24: Massachusetts reported the results of a large number of backlogged tests performed by Quest Diagnostics dating back to April 13.

June 1: Massachusetts started reporting probable cases and deaths. This included the cumulative total of probable cases and deaths going back to March 1, leading to a large one-day increase.

June 30: Massachusetts removed duplicate reports, causing a decrease in the total number of deaths.

Aug. 23: Massachusetts did not report new cases or deaths during data system maintenance.

Sept. 2: Massachusetts revised its methodology for probable cases and deaths, removing 8,050 previously announced cases and 26 deaths.

Nov. 27: Massachusetts reported data for Nov. 26 and 27 after reporting no data on Thanksgiving.

Dec. 26: Massachusetts reported data for Dec. 25 and 26 after reporting no data on Christmas.

Jan. 2: Massachusetts reported data for two days after reporting no data on New Year's Day.

As of Aug. 12, Massachusetts reports only lab-confirmed cases by county. The state previously included probable cases. Massachusetts did not report county-level updates from Aug. 12-17.

The tallies on this page include probable and confirmed cases and deaths.

Confirmed cases and deaths, which are widely considered to be an undercount of the true toll, are counts of individuals whose coronavirus infections were confirmed by a molecular laboratory test. Probable cases and deaths count individuals who meet criteria for other types of testing, symptoms and exposure, as developed by national and local governments.

Governments often revise data or report a single-day large increase in cases or deaths from unspecified days without historical revisions, which can cause an irregular pattern in the daily reported figures. The Times is excluding these anomalies from seven-day averages when possible.

Read more about the methodology and download county-level data for coronavirus cases in the United States from The New York Times on GitHub.