Special Report

This Is the County In the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metro Area Where COVID-19 Is Growing the Fastest

Handout / Getty Images News via Getty Images

After adding over 637,000 new cases throughout the last week, the U.S. now has more than 44.3 million confirmed cases of COVID-19. There have been more than 710,000 COVID-19-related deaths — the highest death toll of any country.

New cases continue to rise, albeit at a slowing rate. In the past week, there were an average of 28.1 daily new coronavirus cases per 100,000 Americans — a decrease from the week prior, when there were an average of 33.4 daily new coronavirus cases per 100,000 people.

While COVID-19 has spread to nearly every part of the country, cities continue to be the sites of major outbreaks. Experts agree that the virus is more likely to spread in group settings where large numbers of people routinely have close contact with one another, such as colleges, nursing homes, bars, and restaurants. Metropolitan areas with a high degree of connectivity between neighborhoods and a large population may be particularly at-risk.

The Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, metro area consists of Philadelphia County, Montgomery County, Bucks County, and eight other counties. In the past week, there were an average of 22.3 new coronavirus cases every day per 100,000 Philadelphia residents, less than the national figure. The metro area’s average daily case growth in the most recent week is essentially unchanged from the week prior, when there was an average of 24.0 daily new cases per 100,000 Philadelphia residents.

The spread of coronavirus depends on a variety of factors and can vary even between neighboring counties. Within the Philadelphia-Camden-Wilmington metro area, COVID-19 is growing the fastest in New Castle County, Delaware. There were an average of 36.3 new cases per day per 100,000 residents in New Castle County during the past week, the most of the 11 counties in Philadelphia with available data.

Case growth in the Philadelphia metro area varies at the county level. In Philadelphia County, for example, there were an average of 16.4 new cases per day per 100,000 residents in the past week — the least of any county in Philadelphia and more than the case growth rate in New Castle County.

Just as New Castle County is driving the growth of COVID-19 in the Philadelphia area, it also has the highest incidence of cases overall. As of October 14, there were a total of 14,193.8 confirmed cases per 100,000 residents in New Castle County, the most of the 11 counties in the metro area. For comparison, the U.S. has so far reported 13,646.9 cases per 100,000 Americans nationwide.

In order to slow the spread of COVID-19, city and county governments have ordered the closure of thousands of consumer-facing businesses. These measures have led to widespread job loss and record unemployment. In New Castle County, unemployment peaked at 15.0% in May 2020. As of June 2021, the county’s unemployment rate was 5.9%.

To determine the county in every metropolitan area where COVID-19 is growing the fastest, 24/7 Wall St. compiled and reviewed data from state and local health departments. We ranked counties according to the average number of new daily COVID-19 cases per 100,000 residents in the seven days ending October 14. To estimate the incidence of COVID-19 at the metropolitan level, we aggregated data up from the county level using boundary definitions from the U.S. Census Bureau. Population data used to adjust case and death totals came from the U.S. Census Bureau’s 2019 American Community Survey and are five-year estimates. Unemployment data is from the Bureau of Labor Statistics and is not seasonally adjusted.

These are all the counties in Pennsylvania where COVID-19 is slowing (and where it’s still getting worse).

Rank in MSA County Population New daily cases per 100,000, week ending October 14 New daily cases per 100,000, week ending October 7 Cumulative cases per 100,000 Cumulative deaths per 100,000
1 New Castle County 556,165 36.3 40.0 14,193.8 177.1
2 Cecil County 102,552 31.5 35.7 8,159.8 165.8
3 Salem County 62,990 29.9 32.7 11,954.3 317.5
4 Gloucester County 291,165 28.8 33.2 12,837.7 243.5
5 Bucks County 626,806 24.9 23.3 11,337.0 222.2
6 Camden County 506,738 24.1 29.8 13,126.1 279.2
7 Chester County 519,560 22.5 23.8 9,433.0 165.9
8 Burlington County 445,702 21.7 25.0 11,962.5 208.7
9 Montgomery County 823,823 19.7 20.1 10,055.6 220.2
10 Delaware County 564,554 19.1 18.1 10,712.2 261.8
11 Philadelphia County 1,579,075 16.4 18.0 11,250.3 250.1

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