Los Angeles Almanac Logo
Home | All Almanac Topics | Health

Novel Coronavirus 2019 (COVID-19)
Los Angeles County

COVID-19 Coronavirus, Los Angeles County

Transmission electron micrograph of SARS-CoV-2 virus particles, emerging from the surface of a cell cultured in the lab. Image captured and color-enhanced at NIAID's Rocky Mountain Laboratories in Hamilton, Montana. Image courtesy of National Institute of Health, NIAID.

September 27, 2021

Total cases: 1,455,155

Total deaths: 26,018

New cases reported today: 986

7-Day Moving Average: 1,460 (previous day's 7-day average: 1,462)

New deaths reported today: 5

7-Day Moving Average: 26 (previous day's 7-day average: 27)

Also see: Day-to-Day Case & Death Numbers since January 2020.

As reported by the Los Angeles County Dept. of Public Health, Long Beach Health Dept., and Pasadena Public Health Dept.


COVID-19 IN CALIFORNIA
Updated September 27 with data from September 26:
Total Cases: 4,471,635 | Total Deaths: 68,362
Cases Reported For This Day: 7,206 | Deaths Reported This Day: 97

Data not reported on weekends and state holidays. Data for day may include unreported numbers from days prior.

Source: California Dept. of Public Health



Daily New COVID-19 Cases Over the Past 14 Days

Number of daily new cases reported in Los Angeles County over the past 14 days. Blue bars represent number of new cases each day. The dashed orange line shows the 7-day moving average. The percentage labelled "Rising" or "Falling" or "Steady" represents the difference between today's 7-day average number of new cases versus that of 14 days ago.

COVID-19 Cases, Los Angeles County

Los Angeles Almanac Chart

Please Note: Case numbers for Sep. 11-12 in the chart above are the Almanac's statistical "work-back" estimates, because Public Health released no specific data for these dates, due to a data systems upgrade. Public Health did say that some backlogged cases were added as they executed their upgrades, which may account for the spike during these two days.



Timeline, Coronavirus, COVID-19, Los Angeles County
Timeline of COVID-19 Cases by Community in Los Angeles County
Top 25 Communities, March 2020 through September 2021


Also featured: Top 25 Communities for New Cases During August 2021 Only.


Time-Lapse Map Video of Coronavirus, Los Angeles County
Video shows time-lapse spread of COVID-19 across Los Angeles County, from March 16 to July 22, 2020.

COVID-19 Cases as L.A. County Closed, Reopened, Reclosed

7-Day Moving Average of Daily New COVID-19 Cases - March 10, 2020 through September 26, 2021

"7-Day Moving Average" is the average number of reported cases over the day of report plus the previous six days. The average changes (or "moves" or "rolls") with each successive day as the seven-day period shifts forward with each new day.

Daily Moving 7-Day Average COVID-19 Cases, Los Angeles County

Los Angeles Almanac chart.


New Cases and Deaths by Week

September 2020 - Present

For weeks prior to Sep. 2020, see: Chart of Weekly Cases, Mar. 2020 - Aug. 2020.

(Also see: Table of COVID-19 Cases & Deaths Each Day in Los Angeles County)

COVID-19, Cases, Los Angeles County

Los Angeles Almanac chart.

Note regarding week, ending May 29, in chart above: 3,857 additional cases were added to the cumulative number of COVID-19 cases for this week. These cases (lighter orange portion of that week's data bar in the chart) actually occurred over the previous year, as far back as March 16, 2020. These were not initially identified as COVID-19 cases, but only later determined to have been COVID-19 infections.
Note regarding week, ending Aug. 21, in chart above: Public Health added 10,163 additional cases on Aug. 20 to the cumulative number for the county. These were cases of individuals who, over the course of the pandemic, had a repeat positive test more than 90 days after their initial infection.
Note regarding week, ending Sep. 11, in chart above: Public Health did not release specific data for Sep. 11, due to a data systems upgrade. The final cumulative number of cases here includes an estimated number for Sep. 11 based upon the Almanac's statistical "work-back" for that date.


For weeks prior to Sep. 2020, see: Chart of Weekly Deaths, Mar. 2020 - Aug. 2020.

COVID-19, Deaths, Los Angeles County

Los Angeles Almanac chart.

Note regarding week, ending Feb. 27, in chart above: 806 additional deaths were added to the cumulative number of COVID-19 deaths for this week. These deaths (purple portion of that week's data bar in the chart) actually occurred during the surge that lasted from Dec. 3 through Feb. 3. These, however, were not initially identified as COVID-19 deaths, but only were later determined to have been deaths due to COVID-19, after an extensive review of vital records. The actual number of COVID-19 deaths during this week came to 729.
Note regarding week, ending May 29, in chart above: 118 additional deaths were added to the cumulative number of COVID-19 deaths for this week. These deaths (also the purple portion of that week's data bar in the chart) actually occurred over the previous year. As in the additional deaths noted above, these were not initially identified as COVID-19 deaths, but only were later determined to have been deaths due to COVID-19.
Note regarding week, ending Sep. 11, in chart above: Public Health did not release specific data for Sep. 11, due to a data systems upgrade. The final cumulative number of deaths here includes an estimated number for Sep. 11 based upon the Almanac's statistical "work-back" for that date.

Source: Numbers as reported daily by the Los Angeles County Dept. of Public Health, Long Beach Health Dept., and Pasadena Public Health Dept. The cities of Long Beach and Pasadena operate public health departments independent of the Los Angeles County Department of Public Health. Los Angeles County's other 86 cities, including the City of Los Angeles, fall under the county's public health department for public health services and monitoring.


Confirmed COVID-19 Cases by Region

As of September 27, 2021

By Los Angeles County Service Planning Areas

(Please note that we separated the Santa Clarita Valley region from the county's designated San Fernando Valley Service Planning Area for statistical purposes.)

Percentage of overall county population for each region is in blue type above number of cases.

COVID-19 Cases, Los Angeles County
Daily Reported COVID-19 Cases, Los Angeles County

The following two maps show cumulative cases by region in Los Angeles County, for the first 25 days of September, and, by comparison, for the preceding month. The September map will be updated every 5 days.

COVID-19 Cases, September 2021, Los Angeles County
COVID-19 Cases, August 2021, Los Angeles County

For maps of cases by county region, only for the month of July, 2021, and month of June, 2021.



By City of Los Angeles Regions

Percentage of overall city population for each city region is in blue type above number of cases.

COVID-19 Cases, City of Los Angeles

Note: The total number of cases for all regions within the county or the city of Los Angeles may not match the total reported for that jurisdiction as whole. We count only cases specifically identified by community. For ratio of cases to population, we use U.S. Census Bureau 2018 estimates as the most recent population numbers available.

Maps for earlier dates


The following two maps show cumulative cases by city region within the City of Los Angeles for the first 25 days of September, and by comparison, for the preceding month. The September map will be updated every 5 days.

COVID-19 Cases, September 2021, Los Angeles City
COVID-19 Cases, August 2021, Los Angeles City

For maps of cases by region within the city of Los Angeles, only for the month of July, 2021, and month of June, 2021.

Source: From data reported by the Los Angeles County Dept. of Public Health, Long Beach Health Dept., and Pasadena Public Health Dept. Charts created by the Los Angeles Almanac.

Also see: Cases by Specific City/Community.


COVID-19 Deaths by Los Angeles County Service Planning Areas
The following map, updated monthly, shows cumulative deaths by region in Los Angeles County, through August 31, 2021.

Percentage of overall city population for each city region is in blue type above number of cases.

COVID-19 Deaths, Los Angeles County

COVID-19 Deaths by Region Map through July 2021 | June 2021 | May 2021 | April 2021 | March 2021 | February 2021 | January 2021



COVID-19 AND RACE IN LOS ANGELES COUNTY

COVID-19, Coronavirus, Pandemic, Race, Ethnicity, Los Angeles County
Although COVID-19 has reached every corner of Los Angeles County, its impact and vaccines administered to fight it have not been proportionate among our population.



Hospitalized COVID-19 Patients in Los Angeles County

Medical, Nurse, Hospital

Last 7 Days (For all Los Angeles County, except Long Beach and Pasadena).

Date Total Hospitalized Confirmed COVID-19 Patients COVID-19 Patients in ICU
9/26/2021 908 281
9/25/2021 907 281
9/24/2021 947 275
9/23/2021 956 306
9/22/2021 991 307
9/21/2021 991 307
9/20/2021 1,018 316

Source: Los Angeles County Dept. of Public Health COVID-19 Surveillance Dashboard


Positive Tests for COVID-19 in Los Angeles County

As of September 25, 2021

COVID-19 Testing Site, Los Angeles County
Cumulative Persons Tested: 8,587,912
7-Day Average Daily Positive Rate: 1.2% (7 days before: 1.3%)
Cumulative Positive Rate: 15.6% (7 days before: 15.7%)

Note: For all Los Angeles County, except Long Beach and Pasadena.

Source: Los Angeles County Dept. of Public Health COVID-19 Surveillance Dashboard




L.A.’S LAST PANDEMIC

The 1918-1919 Influenza Pandemic
A century before COVID-19, Los Angeles had to live through its first global pandemic. It may even sound familiar.


Number of Confirmed COVID-19 Cases by City/Community

Map, Los Angeles County, Communities, COVID-19

As of September 27, 2021

For Los Angeles County, including Long Beach and Pasadena

Also see: COVID-19 Deaths by Community, Los Angeles County


Through June 22, 2020, the city of Avalon on Santa Catalina Island was the last of Los Angeles County's 88 incorporated cities to be free of any confirmed COVID-19 cases. That was until the following day when, on June 23, it was reported that the city had its first case.


Places of residence for 16,977 cases remain under investigation. Remaining cases are distributed as below:

(The City of Los Angeles, as a whole, has recorded 594,003 cases)

Place cursor over bar for specific number. Click here for this list in text format.

Created with Google Charts

Numbers above are subject to change based upon further investigation.

** Unincorporated Community

PLEASE NOTE: Los Angeles County Public Health cautions that the public should not assume that any location in the county is safer from exposure than any other. Cases are occurring across the county, so remain aware and practice social distancing. It should also be noted that an unusually high number of cases within a particular community may possibly be attributed to an outbreak at one or more institutional settings (such as a nursing or jail facility).

Sources:
Los Angeles County Department of Public Health
Long Beach Health Department
Pasadena Public Health Department


On Mar. 11, Los Angeles County Public Health reported the county's first virus-connected death. The patient was a 60-year-old female visitor from outside the county who had recently traveled outside the U.S. The second death was reported on Mar. 19 in the Pasadena area.


On Mar. 9, Los Angeles County Public Health reported the county's first positive case of COVID-19 where the patient had an unknown source of exposure to the virus. The second case was reported on Mar. 11.


The first COVID-19 case in Los Angeles County, a foreign traveler passing through Los Angeles International Airport, was announced on Jan. 26, 2020. The patient had since recovered and no person-to-person transmissions of the virus had been connected to this person.


Also from the Los Angeles County Dept. of Public Health:

Corona Virus Information