* This dataset contains percentage/number of population uninsured in given county. The numbers are for age groups, sex, race. Data is as of March 2020.
<https://data.cms.gov/Marketplace-Eligible-Uninsured-People-for-Outreach/The-Percent-of-Estimated-Eligible-Uninsured-People/9hxb-n5xb>

* This dataset has census data from 2010 to 2019. It has features such as total population estimates, births and deaths in given period. This information is at county level. This can help to compare the COVID-19 mortality rate with past mortality rate. 
<https://www.census.gov/data/tables/time-series/demo/popest/2010s-counties-total.html#par_textimage>

* There are multiple datasets in this page but these contain data till July 2019. This dataset has population for age, sex and race.
<https://www.census.gov/data/tables/time-series/demo/popest/2010s-national-detail.html>
