Reporting County-Level COVID-19 Vaccination Data

Reporting County-Level COVID-19 Vaccination Data

CDC’s COVID Data Tracker provides COVID-19 vaccination data in the United States. Please visit the About COVID-19 Vaccine Delivered and Administration Data to better understand the IT systems behind the COVID-19 Data Tracker.

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COVID-19 Data Tracker

View an integrated, county view of key data, including vaccinations, for monitoring the COVID-19 pandemic in the United States.

This site provides an integrated, county view of key data for monitoring the COVID-19 pandemic in the United States. It allows users to explore standardized data across the country, including vaccine data.

Data Sources

Vaccination providers collect data on COVID-19 vaccine doses they administered and report the data to CDC through multiple sources, including:

  • jurisdictions,
  • pharmacies, and
  • federal entities.

These sources use various reporting methods including immunization information systems, the Vaccine Administration Management System, and direct data submission.

For these county-level data CDC additionally uses these datasets:

Census CDC used 2019 Vintage Census Population Estimates and 2018 CIA World Factbook data to calculate county-level population density, household size, insurance status, poverty level, and percent of population age 65 and older.

Social Vulnerability Index (SVI) scores, which range from 0 to 1, are from CDC/ATSDR’s Geospatial Research, Analysis and Service Program. COVID-19 Community Vulnerability Index (CCVI) scores, which also range from 0 to 1, are from Surgo Ventures.external icon

Age

CDC uses estimates for the total population, population aged 18 years and older, and population aged 65 years and older as the denominators to calculate percentages.

County of Residence

CDC determines county of residence by matching the county Federal Information Processing Standard State (FIPS) code to the state as submitted in the raw data provided to CDC. For this, CDC’s COVID Data Tracker attributes each dose to the state or territory in which the person resides. This includes doses administered by:

  • jurisdictional partner clinics,
  • retail pharmacies,
  • long-term care facilities,
  • dialysis centers participating in the Federal Dialysis Center Program,
  • the Federal Emergency Management Agency (FEMA),
  • Health Resources and Services Administration (HRSA) partner sites, and
  • federal entity facilities (e.g., Department of Defense, Veterans Health Administration, Indian Health Service, and Bureau of Prisons).

CDC makes every effort to determine the county of residence for all administered and reported doses; however,

  • systematic missing data in some states, either reported through jurisdiction, retail pharmacies, long-term care facilities, or federal entity facilities, may result in vaccination coverage by county appearing artificially low.
  • CDC has excluded from county-level summary measures vaccination records missing county of residence.
  • Additionally, CDC’s COVID Data Tracker includes vaccination data reported by state and, where applicable, local Immunization Information Systems (IISs). If an individual is vaccinated outside of the region covered by their local IIS, that dose will be reported to the state IIS and may not be reflected in the county-level totals reported by the local IIS.

Data Variation

Data presented here use standard metrics across all United States counties. However, data on this page might differ from data on state and local websites. This can be due to:

  • differences in how data were reported or
  • how the metrics are calculated.

For the most accurate and up-to-date data for a specific county or state, visit the relevant state or local health department website. 

Exceptions to County-Level Data

  • California does not report the county of residence for persons receiving a vaccine when the resident’s county has a population of fewer than 20,000 people.
  • Hawaii does not provide CDC with county-of-residence information.
  • Texas provides data that are aggregated at the state level and cannot be stratified by county.

Where there is no information to report, the jurisdiction will appear as “no data” on the map. 

Timing of Updates

Data on vaccine doses administered include data received by CDC as of 6:00 a.m. ET on the day of reporting. Data will be updated after review and verification, usually before 8:00 pm ET. On federal holidays, updates will occur the following day. Note: Daily updates might be delayed due to delays in reporting.

COVID-19 Vaccinations County-level Data Definitions

Percent of a Jurisdiction’s Fully Vaccinated Recipients with a Valid County of Residence 

Represents the proportion of fully vaccinated people whose Federal Information Processing Standards (FIPS) code is reported and matches a valid county FIPS code in the jurisdiction.  

Percent of the Population Metrics

CDC calculates measures of vaccination among the entire population (i.e., all ages), the population aged 18 years and older, and the population aged 65 years and older.

  • The metrics used for rate and percentage calculations use the S. Census Bureau Annual Estimatesexternal icon of the Resident Population for the United States and Puerto Rico, 2019 population.
  • CDC uses 2018 CIA World Factbook estimates for American Samoa, Federated States of Micronesia, Guam, Republic of the Marshall Islands, Republic of Palau, Republic of the Marshall Islands, and U.S. Virgin Islands. 

People Who Are Fully Vaccinated; % of the Population

Represents the number of people who have received the second dose in a two-dose COVID-19 vaccine series or one dose of the single-shot J&J/Janssen COVID-19 vaccine.

For this measure, CDC’s COVID Data Tracker attributes each dose to the state or territory in which the person resides. This includes doses administered by jurisdictional partner clinics, retail pharmacies, long-term care facilities, FEMA, HRSA partner sites, and federal entity facilities. CDC uses estimates for the total population, population aged 18 years and older, and population aged 65 years and older as the denominators to calculate percentages.

CDC has capped the percent of population coverage metrics at 99.9%. These metrics could be greater than 99.9% for multiple reasons, including census denominator data not including all individuals that currently reside in the county (e.g., part time residents) or potential data reporting errors. Estimates may change as new data are made available.

County-Level Data for People Who Are Not Fully Vaccinated

County level data for people with at least one dose of a vaccine are not displayed for reasons including:

  • address reporting errors preventing assignment of recipients to a county of residence and
  • vaccine recipients reporting different addresses for their first and second doses of an mRNA vaccine.

Recent data quality improvements have been made by jurisdictions for second doses of 2-dose vaccines, therefore, CDC will only display data for people who are fully vaccinated. CDC provides national and jurisdictional (state, territory, or local entity) level data for people with at least one dose and people who are fully vaccinated on the “Vaccinations in the US” page of CDC COVID Data Tracker.

Downloading Data

Users can download .CSV files of all data presented on CDC’s COVID Data Tracker. Additional vaccination data sets for COVID-19 and other diseases can be found at https://data.cdc.gov/browse?category=Vaccinations.