How many Americans remain unvaccinated against COVID-19
As of the most recent multi-year data from the U.S. Centers for Disease Control and Prevention (CDC), a notable share of the U.S. population has not received any COVID-19 vaccine dose. This article explains what metrics public health agencies use, how rates differ by age, race and ethnicity, geography, and time, and what factors contribute to remaining unvaccinated. We rely on nationally representative surveys, including CDC’s National Immunization Survey (NIS) and the Census Bureau’s Household Pulse Survey, focusing on estimates rather than snapshots so the patterns remain useful over time.
Core definitions used for COVID-19 vaccination status
To compare COVID-19 vaccination coverage across groups, agencies define key categories consistently. An unvaccinated person has not received any vaccine dose; a partially vaccinated person has received at least one dose but not a complete series (depending on product and time); a fully vaccinated person has completed a primary series; and a up-to-date person has received all recommended booster doses for their age and health condition. These distinctions matter because eligibility and recommendations evolved as vaccines were authorized, new variants emerged, and guidance was updated. Using stable metrics helps clarify how behavior changed and where gaps remain.
National estimates: what the latest data say
Recent large household surveys provide overlapping windows that can be combined into a durable picture. Key figures shown together in the table below illustrate levels of unvaccinated individuals across age groups and trends over time. Because measurement approaches and timing vary, estimates are best read as ranges rather than single precise values.
U.S. COVID-19 vaccination coverage snapshot
| Metric / Group | Estimated Share | Source and Period |
|---|---|---|
| Adults (18+) who have never received a COVID-19 vaccine dose (unvaccinated) | Approximately 13–16% | CDC NIS (Adults), 2022–2023 data |
| Children 5–17 with no COVID-19 vaccine doses | Approximately 20–28% (varies by age subgroup) | CDC NIS-Child (5–17), 2022–2023 data |
| Adults who are up-to-date with current recommendations | Approximately 65–73% | Combined CDC NIS and CHIS, 2022–2023 |
| Adults with at least one dose (ever vaccinated) | Approximately 84–87% | CDC COVID Data Tracker, published 2022–2023 |
| Households with at least one unvaccinated child (Household Pulse) | Approximately 20–25% | Census Household Pulse, rolling 6-month averages 2022–2023 |
Demographic patterns in who remains unvaccinated
Vaccination coverage is not uniform across the country. Young adults, people living in rural areas, some racial and ethnic minority groups (particularly Hispanic and Black adults in many measures), and people with lower income or less education have tended to show higher unvaccinated shares in repeated surveys. These gaps reflect a mix of access, trust, convenience, and perceived risk factors that vary by community. Public health efforts have increasingly targeted these differences with community-based outreach, mobile clinics, and clear communication tailored to local languages and cultures.
Geographic variation across states and counties
At the state level, self-reported vaccination rates differ, and maps of unvaccinated concentration often show clusters in certain regions. Urban counties typically have higher coverage, while some rural and remote counties report substantially higher shares of the unvaccinated. These patterns influence local outbreak risk, hospital capacity, and the need for tailored communication. Health departments use granular local data to prioritize resources such as pop-up clinics, partnerships with trusted community organizations, and plain-language information in multiple formats.
Changes over time and the role of boosters
Unvaccinated proportions have generally declined from the earliest months after vaccine authorization but have plateaued for some groups. Each new vaccine round, including updated boosters, narrows the gap for those who accept additional protection but leaves a persistent minority who remain unvaccinated. This dynamic is important for planning outreach and anticipating demand for future formulations. Routine immunization programs, school requirements, and workplace policies can continue to influence coverage, especially when combined with efforts to reduce barriers such as transportation or child care during vaccination visits.
Why these numbers matter for public health and planning
Understanding who remains unvaccinated helps health officials target resources where they are most needed and design messages that resonate with specific audiences. It also clarifies the scale of protection in a population and where continued vulnerability to severe COVID-19 may persist. Data-driven strategies that combine clear information, improved access, and community partnership are central to reducing disparities over time. As guidance and products evolve, ongoing monitoring will remain essential to maintain broad protection and respond quickly to any future shifts in coverage.
Comparing U.S. COVID-19 vaccination coverage to other high-income countries
U.S. COVID-19 vaccination rates are broadly comparable to those in other wealthy nations, though each country’s mix of primary series completion and booster uptake differs. Some nations with centralized procurement and strong primary care networks report higher rates of full series completion, while others emphasize booster rollouts more heavily. These comparisons highlight that no single model works everywhere, and local context—trust in institutions, health system structure, and communication strategies—shapes outcomes as much as policy design does.