After adding over 148,000 new cases on Apr. 12, the U.S. now has more than 30.8 million confirmed cases of COVID-19. There have been more than 550,000 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 20.7 daily new coronavirus cases per 100,000 Americans — essentially unchanged from the week prior, when there were an average of 19.5 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.
In the 50 largest metro areas, the incidence of coronavirus grew at an average rate of 22.9 new cases a day per 100,000 residents in the past week — 14.3% greater than the case growth in all counties outside of metro areas.
The St. Louis, MO-IL, metro area consists of St. Louis County, St. Charles County, the city of St. Louis, and 12 other counties. In the past week, there were an average of 15.0 new coronavirus cases every day per 100,000 St. Louis 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 14.4 daily new cases per 100,000 St. Louis residents.
The spread of coronavirus depends on a variety of factors and can vary even between neighboring counties. Within the St. Louis metro area, COVID-19 is growing the fastest in Jefferson County. There were an average of 20.7 new cases per day per 100,000 residents in Jefferson County during the past week, the most of the 15 counties in St. Louis with available data.
Case growth in the St. Louis metro area varies widely at the county level. In Calhoun County, for example, there were an average of 3.4 new cases per day per 100,000 residents in the past week — the least of any county in St. Louis and far more than the case growth rate in Jefferson County.
While Jefferson County is driving the growth of COVID-19 in the St. Louis area, it does not have the highest incidence of cases overall. As of Apr. 12, there were a total of 10,103.5 confirmed cases per 100,000 residents in Jefferson County, the 10th most of the 15 counties in the metro area. For comparison, the U.S. has so far reported 9,498.2 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 Jefferson County, unemployment peaked at 10.3% in April 2020. As of January 2021, the county’s unemployment rate was 5.1%.
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 Apr. 12. 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 Apr. 12 | New daily cases per 100,000, week ending Apr. 5 | Cumulative cases per 100,000 | Cumulative deaths per 100,000 |
|---|---|---|---|---|---|---|
| 1 | Jefferson County | 223,951 | 20.7 | 18.4 | 10,103.5 | 104.5 |
| 2 | Lincoln County | 56,477 | 20.0 | 19.5 | 10,055.4 | 69.1 |
| 3 | Monroe County | 34,168 | 18.8 | 15.2 | 12,526.3 | 263.4 |
| 4 | St. Charles County | 394,290 | 17.2 | 16.7 | 10,642.2 | 111.1 |
| 5 | St. Louis County | 996,919 | 16.1 | 14.2 | 9,466.9 | 211.5 |
| 6 | Jersey County | 21,937 | 16.1 | 15.9 | 11,833.9 | 218.8 |
| 7 | Warren County | 34,453 | 15.9 | 11.2 | 8,922.3 | 58.1 |
| 8 | Madison County | 264,776 | 13.1 | 16.1 | 11,158.1 | 193.0 |
| 9 | Franklin County | 103,191 | 11.9 | 13.1 | 10,205.3 | 171.5 |
| 10 | St. Louis city | 308,174 | 11.6 | 12.3 | 7,455.5 | 148.6 |
| 11 | St. Clair County | 262,338 | 11.4 | 11.1 | 10,258.5 | 189.8 |
| 12 | Macoupin County | 45,463 | 7.7 | 8.8 | 9,992.7 | 178.2 |
| 13 | Bond County | 16,589 | 6.4 | 8.9 | 11,754.8 | 144.7 |
| 14 | Clinton County | 37,634 | 4.3 | 6.2 | 15,116.6 | 239.1 |
| 15 | Calhoun County | 4,830 | 3.4 | 12.7 | 10,496.9 | 41.4 |
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