The average mean travel times to COVID-19 vaccination sites was found to be 75.5 minutes. Integration with population estimates showed an average of 87.2% of the adult population within an hour of a vaccination site. At national level, the coverage rate was 16.70% (95% CI 16.66 – 16.74) in December 2021 and 30.75% (95% CI 25.04 – 36.96) by the end of March 2022.  Approximately 21 million adults were still unvaccinated in December 2021 and, in the absence of accelerated vaccine uptake, over 17.2 million adults may not be vaccinated by end March 2022 nationally. These results highlight inequalities in vaccinations and efforts should be prioritized in hard-to-reach populations.