Data on deaths and cases for states and counties comes from the Centers for Disease Control and Prevention and Washington Post reporting. Post-reported data is gathered from state sites and from county and city sites for certain jurisdictions. Deaths are recorded on the dates they are announced, not necessarily the dates they occur.
Hospitalization data since July 15, 2020, is from the Department of Health and Human Services TeleTracking and HHS Protect hospital reporting systems. It updates once daily by early afternoon but should be considered provisional until updated with weekly historical HHS data. Hospitalization data before July 15, 2020, was provided by state health departments.
All numbers are provisional and may be revised by the jurisdictions.
The seven-day rolling average uses the past seven days of new daily reported cases or deaths to calculate a daily average, starting from the most recent full day of data. Occasionally states will report large single-day “spikes” because of a reporting backlog, an identification of probable cases or a revision of reporting standards. These spikes are displayed on the daily charts but not included in rolling seven-day averages.
Population data represents five-year estimates from the 2019 American Community Survey by the Census Bureau.
Originally published March 27, 2020.
Recent changes on this page
January 12, 2023 The Post moved to visualizing only seven-day averages for newly reported cases and deaths.
October 20 The CDC announced it would only be updating case and death data weekly. This switch in reporting cadence may have led some states to see large artificial spikes in cases and deaths. Hospitalization data, from HHS, will continue to be updated daily.
October 4 The Post moved to using case and death data provided by the Centers for Disease Control for all states and territories except for New York.
August 17 Removed the “hot spots” chart in favor of a broader summary of cases, deaths and hospitalizations. Removed data on test positivity due to the increasing use of home COVID tests, most of which go unreported to health agencies. Removed vaccinations, as data on COVID vaccinations have become less instructive as the counts of those receiving initial shots or boosters drops.
August 12 Removed the county-level map, pending a review of how to best display inconsistently reported county-level data.
January 20, 2022 Switched the percent change column in the county tables to the percentage change in rolling average, rather than in total cases/deaths.
November 10 Redesigned page and added features.
March 3 Changed the data source for tests to the Department of Health and Human Services.
February 23 Changed the data source for hospitalizations to the Department of Health and Human services. See the methodology note for more details.
February 19 Marked anomalous days on the daily count chart, and reformatted the chart note to better track data anomalies.
February 12 Updated vaccination charts to reflect reported doses administered per day.
February 2 For five states with limited state hospitalization reports (WV, NV, ND, MS, and WY), data now comes from the Department of Health and Human Services, instead of state reports.
January 8, 2021 Added a data table and charts for vaccinations, and changed the vaccination metrics to display the most reliable data available.
December 23 Added vaccination data to state summaries where available.
December 15 Removed anomalous data from the rolling averages (such as backlogged cases or deaths reported in bulk on a single day), and other data improvements.
December 1 Updated the presentation of hospitalization and testing data, and added aggregate U.S. data for those indicators.
October 30 Added several notes clarifying which days states are expected to report data.
October 28 Switched to reported case counts from the Kansas Department of Health and Environment which only provides data updates on Mondays, Wednesdays and Fridays. This has also resulted in a one-day spike of reported cases on Oct. 28.
September 18 Switched to using the confirmed death counts for Bronx, Kings, New York, Queen's, and Richmond counties as reported by New York City, while continuing to use the state's reporting for deaths in all other counties. This has resulted in a one-day spike of 2,732 deaths. Read more about how NYC's methodology differs from NY state's. The Post has been using the city's probable death counts since April. Given the difference in the methodologies between the state and the city, the Post feels that the city's numbers, which are derived both from positive blood tests and from deaths reported by the city's Office of the Chief Medical Examiner, provide a clearer indication of the fatality count than the state's approach, which uses numbers reported by hospitals, nursing homes, and other health care facilities. This means that the city's counting process is more likely to include deaths that occurred outside of care settings.
August 24 Replaced the modeled trend with a more standard 7-day rolling average of new daily cases and deaths.
August 20 Added a module to show the aggregate statistics in the U.S. and each state/territory over the past week.
July 29 Added hospitalization data and other page improvements.
July 2 Replaced the 7-day running average of new cases and deaths with a 14-day modeled trend. Added the week-over-week percentage change to the trends charts, using the modeled trend values. Also added additional columns to the data tables.
June 23 Added charts showing new daily counts in each state, ordered by the percentage increase in cumulative cases over the last week. Changed the default view of the page to confirmed cases per 100k.
June 11 Added an option to view change since last week to the map. The default view of the map is now deaths per 100k in the last seven days.
May 13 Added a line indicating the seven-day rolling average or reported cases and deaths to the national and state by day chart at the top of the page. The deaths total at the top of the page was revised to round the deaths number down to the nearest thousand.
May 6 Included revised data from New York City probable covid-19 deaths that attributes each death to the day it was first reported instead of on April 14.
April 24 The data on the page was revised to include Post-reported numbers. Reported data for New York City is now reported separately by county instead of being aggregated into one New York City total.
April 23 Date when states began reopening added to state charts.
April 21 Charts showing testing data for all U.S. states and territories were added to the page.
April 14 New York City adds nearly 3,700 probable covid-19 deaths to its total.
April 7, 2020 Labels showing the date state emergency and stay-at-home orders were declared added to the state charts.
