After adding over 682,000 new cases throughout the last week, the U.S. now has more than 48.2 million confirmed cases of COVID-19. There have been more than 770,000 COVID-19-related deaths — the highest death toll of any country.
New cases continue to rise at a steady rate. In the past week, there were an average of 0.8 daily new coronavirus cases per 100,000 Americans — essentially unchanged from the week prior, when there were an average of 1.7 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 Pittsburgh, PA, metro area consists of Allegheny County, Westmoreland County, Washington County, and four other counties. In the past week, there were an average of 1.7 new coronavirus cases every day per 100,000 Pittsburgh residents, in line with 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 1.4 daily new cases per 100,000 Pittsburgh residents.
The spread of coronavirus depends on a variety of factors and can vary even between neighboring counties. Within the Pittsburgh metro area, COVID-19 is growing the fastest in Butler County. There were an average of 2.4 new cases per day per 100,000 residents in Butler County during the past week, the most of the seven counties in Pittsburgh with available data.
Case growth in the Pittsburgh metro area varies at the county level. In Washington County, for example, there were an average of 1.3 new cases per day per 100,000 residents in the past week — the least of any county in Pittsburgh and more than the case growth rate in Butler County.
While Butler County is driving the growth of COVID-19 in the Pittsburgh area, it does not have the highest incidence of cases overall. As of December 2, there were a total of 15,473.6 confirmed cases per 100,000 residents in Butler County, the fourth most of the seven counties in the metro area. For comparison, the U.S. has so far reported 14,869.9 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 Butler County, unemployment peaked at 15.4% in April 2020. As of June 2021, the county’s unemployment rate was 5.4%.
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 December 2. 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.
| Rank in MSA | County | Population | New daily cases per 100,000, week ending December 2 | New daily cases per 100,000, week ending November 25 | Cumulative cases per 100,000 | Cumulative deaths per 100,000 |
|---|---|---|---|---|---|---|
| 1 | Butler County | 186,899 | 2.4 | 1.7 | 15,473.6 | 293.2 |
| 2 | Westmoreland County | 352,590 | 2.1 | 2.1 | 14,664.6 | 277.9 |
| 3 | Armstrong County | 65,867 | 2.1 | 1.9 | 15,797.0 | 346.2 |
| 4 | Beaver County | 165,833 | 1.9 | 2.4 | 15,594.0 | 314.2 |
| 5 | Fayette County | 131,302 | 1.7 | 0.7 | 15,647.9 | 350.3 |
| 6 | Allegheny County | 1,221,744 | 1.4 | 1.2 | 12,292.2 | 203.8 |
| 7 | Washington County | 207,212 | 1.3 | 1.0 | 14,465.4 | 208.5 |
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