Data Visualization Public Health
Tracking the Trends in the COVID-19 Cases

As the U.S. looks to reopen, citizens are seeking to understand the nature of the spread of COVID in their locations. This interactive map provides up-to-date, county-level information on total cases and the 14-day trend of new cases with population and population-density data. The 14-day average daily change in new cases represents a given number of fewer (or more) cases per day over the most recent 14-day period (ending ).

14-day average daily change in new cases

—Select a county—

Daily new cases

Total Cases Through 
Total Population
Total cases as % population
Population Density 
(people per square mile)

Sources: USAFacts, "Coronavirus Locations: COVID–19 Map by County and State," and The Covid Tracking Project.

Design and Development: Graphic produced by John W. Fleming and Jay Simon. Data compiled by Drew Gonshorowski.

For reference, the median (middle) value for county population is 25,726, and the median county population density is 45 people per square mile. The most densely populated county is New York County (Manhattan) at 71,876. The four most densely populated counties are in New York, and San Francisco is the fifth most densely populated county at 18,834 people per square mile.

Population density is designated “Low” if it is less than 100 people per square mile (roughly the 70th percentile); “Medium” if between 100 and 1,000 (roughly the 95th percentile); “High” if between 1,000 and 10,000; “Very High” if greater than 10,000 (this designation is reserved for the top 10 counties, 4 of which are in New York).

Note:  Originally published on April 29, 2020.